A two-tailed test is considered to be more powerful than a one-tailed test. Therefore, Option D (a two-tailed test) is the correct answer.
The one-tailed test and the two-tailed test are two sorts of hypothesis tests. The number of tails, as the name implies, is the fundamental distinction between the two sorts of hypothesis tests. The tails are the areas under the probability distribution curve that are beyond the critical values or the cut-off points.
The one-tailed test is one of the types of hypothesis testing in which an alternative hypothesis is generated in a specific direction. In comparison to two-tailed tests, they are simpler to conduct. The one-tailed test is less likely to reject the null hypothesis since it only tests one of the tails. On the other hand, the two-tailed test tests both tails of the distribution, making it more powerful since it is more inclusive than the one-tailed test.
The two-tailed test is more effective since it tests for discrepancies on both sides of the distribution, whereas the one-tailed test only tests for discrepancies on one side of the distribution.
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1. The number of red balloons is 3/5 to the number of green balloons. If there are a total of 320 balloons. How many greens balloons are there?
2. Tammi has a bowl of fruit which has only apples and bananas. The ratio is 2 apples to each banana. If there are a total of 15 fruits in the bowl, how many apples are there?
there are 200 green balloons, there are 120 red balloons , there are 10 apples and 5 bananas in the bowl, for a total of 15 fruits. To solve this problem, we need to use the given ratio and the total number of balloons to find the number of green balloons.
Let's assume the number of green balloons is x. Then, the number of red balloons is 3/5 of x, or (3/5)x.
The total number of balloons is 320, so we can write an equation based on the given information:
x + (3/5)x = 320
To solve for x, we can simplify the equation:
(8/5)x = 320
x = 200
Therefore, there are 200 green balloons.
To check our answer, we can use the ratio given in the problem:
(3/5)x = (3/5) * 200 = 120
So there are 120 red balloons.
Let's assume the number of bananas is x. According to the given ratio, the number of apples is twice that of bananas, or 2x.
The total number of fruits in the bowl is 15, so we can write an equation based on the given information:
x + 2x = 15
To solve for x, we can simplify the equation:
3x = 15
x = 5
Therefore, there are 5 bananas in the bowl.
To find the number of apples, we can use the ratio given in the problem:
2x = 2 * 5 = 10
So there are 10 apples in the bowl.
To check our answer, we can verify that the ratio of apples to bananas is 2:1:
10/5 = 2
Therefore, there are 10 apples and 5 bananas in the bowl, for a total of 15 fruits.
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In
Circle C,
the diameter is 30 units long,
CE= 6x, and m
Find x.
The diameter of circle C is [tex]x[/tex], which is [tex]5[/tex].
What in geometry is a circle?A circle is the collection of all points on a plane that are at a specified distance from another point (the radius) (the centre). A radius is any distance separating a point on a circle from its center. Any two radii are equal in length under the concept of a circle.
What do you call a half circle?A semicircle is a half circle produced by splitting a circle into two equal parts. It is created when a line pierces the circle's center and touches its two ends.
Since [tex]CE[/tex] is a radius of the circle and the diameter is [tex]30[/tex] units long, we know that [tex]CE[/tex]is half the length of the diameter:
[tex]CE = 1/2[/tex](diameter)[tex]= 1/2([/tex]30 units)[tex]= 15[/tex] units
We are given that [tex]CE = 6x[/tex], so we can solve for [tex]x[/tex]:
[tex]CE = 6x = 15[/tex]
[tex]x = 15/6[/tex]
[tex]x = 2.5[/tex]
Now, we can use the fact that angle [tex]CED[/tex], where [tex]D[/tex] is the center of the circle, is a central angle that intercepts arc [tex]CD[/tex], to find the measure of angle [tex]CED[/tex].
Since the diameter of the circle is a straight line, it forms a [tex]180[/tex] degree angle at its endpoints. Therefore, angle [tex]CED[/tex] is half of this angle, which is:
angle [tex]CED = 1/2(180 degrees) = 90[/tex]degrees
We are given that angle [tex]CED[/tex] is [tex]30[/tex] degrees, so we can set up an equation:
angle [tex]CED = 30 = 6x[/tex]
Simplifying and solving for [tex]x[/tex]:
[tex]6x = 30[/tex]
[tex]x = 30/6[/tex]
[tex]x = 5[/tex]
Therefore, [tex]x[/tex] is equal to [tex]5[/tex].
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Consider the parametric curve x = 4t 3 − 3t, y = t 5 − 5t, t ∈ R. (a) Find the points where the tangent line is horizontal or vertical. (b) Determine the intervals where the slope of the tangent line to the curve is positive or negative. (c) Determine the intervals where the curve is concave upward or downward. (d) Sketch the curve.
The points where the tangent line is vertical are (13/16, -5/16) and (-13/16, 5/16) and The slope of the tangent line is positive on the intervals t < -1 and t > 1, and negative on the interval -1 < t < 1.
How can we analyzing the properties of a parametric curve?(a) To find where the tangent line is horizontal, we need to find values of t where the derivative of y with respect to x (dy/dx) is equal to 0.
We have:
dy/dx = (dy/dt)/(dx/dt) = (5t^4 - 5)/(12t^2 - 3)
Setting dy/dx = 0, we get:
5t^4 - 5 = 0
t^4 = 1
t = ±1 or t = ±i
Substituting t = 1 into the parametric equations gives us the point (1,-4). Substituting t = -1 gives us the point (-1,4). Substituting t = i or t = -i gives us points on the imaginary axis, which are not part of the real plane.
Therefore, the points where the tangent line is horizontal are (1,-4) and (-1,4).
To find where the tangent line is vertical, we need to find values of t where dx/dt is equal to 0.
We have:
dx/dt = 12t^2 - 3
Setting dx/dt = 0, we get:
t^2 = 1/4
t = ±1/2
Substituting t = 1/2 into the parametric equations gives us the point (13/16, -5/16). Substituting t = -1/2 gives us the point (-13/16, 5/16).
Therefore, the points where the tangent line is vertical are (13/16, -5/16) and (-13/16, 5/16).
(b) To determine the intervals where the slope of the tangent line is positive or negative, we need to examine the sign of the derivative dy/dx.
From part (a), we know that dy/dx is equal to:
dy/dx = (5t^4 - 5)/(12t^2 - 3)
The denominator is always positive, so the sign of dy/dx is determined by the numerator.
For t < -1, we have 5t^4 - 5 > 0, so dy/dx > 0.
For -1 < t < 1, we have 5t^4 - 5 < 0, so dy/dx < 0.
For t > 1, we have 5t^4 - 5 > 0, so dy/dx > 0.
Therefore, the slope of the tangent line is positive on the intervals t < -1 and t > 1, and negative on the interval -1 < t < 1.
(c) To determine the intervals where the curve is concave upward or downward, we need to examine the sign of the second derivative d^2y/dx^2.
We have:
d^2y/dx^2 = ((d^2y/dt^2)(dx/dt) - (dy/dt)(d^2x/dt^2)) / (dx/dt)^3
Calculating the second derivatives, we get:
d^2y/dt^2 = 20t^3
d^2x/dt^2 = 24t
Substituting these into the expression for d^2y/dx^2, we get:
d^2y/dx^2 = (20t^3)(12t^2 - 3) - (5t^4 - 5)(24t) / (12t^2 - 3)^3
Simplifying this expression, we get:
d^2
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If Alberto runs 3 1/4 miles each day for 7 days. How would you estimate how far he ran in 11 days
Using fractiοn it can be derived that Albertο can run 250.25 miles in 11 days.
What is fractiοn?In Mathematics, a fractiοn can be defined as the part οf the whοle thing. Fοr example, a cake is divided intο five equal pieces, then each piece is represented by 1/5. There are prοper fractiοns and imprοper fractiοns. The upper value οf a fractiοn is called numeratοr and the lοwer value οf the fractiοn is called denοminatοr.
This is a prοblem based οn fractiοn.
If Albertο runs 3 1/4=13/4 miles each day.[This was a mixed fractiοn. Here it is cοnverted tο imprοper fractiοn.]
Sο in 7 days Albertο can run (7×13)/4 miles
In 11 days he can run (7×13×11)/4 miles.
sο he can run in 11 days = 1001/4 miles.
It is a fractiοnal fοrm. We cοnvert it intο decimal number.
Hence Albertο can run in 11 days 250.25 miles.
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the physician orders medication l 400 mg po twice daily. the pharmacy supplies medication l with a dosage strength of 2 grams per 5 ml. how many milliliters does the nurse advise the patient to take with each dose? enter the numeral only, not the units.
The nurse will advise the patient to take 1 ml of medication with each dose.
The physician orders medication at 400 mg po twice daily. The pharmacy supplies medication with a dosage strength of 2 grams per 5 ml.
How many milliliters does the nurse advise the patient to take with each dose?
The nurse should advise the patient to take 1 ml of medication with each dose.
To find the number of milliliters, the following formula will be used.
Dose × Volume/Strength
Given, Dose = 400 mg
Strength = 2 grams per 5 ml
Volume = ?
To convert 400 mg to grams, divide by 1000.
400 mg = 400/1000 = 0.4 g
Now, put the values in the formula,
0.4 g × Volume / 2 g/ 5 ml= 5/2 × 0.4/1= 5/2 × 0.4= 1 ml
Hence, the nurse will advise the patient to take 1 ml of medication with each dose.
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What is the correct mathematical description for the expression 25 ÷ 5 + (6 x 2) − 4.5?
25 divided by 5 plus 6 times 2 minus 4 and 5 tenths
25 divided by the sum of 5 and 6 times 2 minus 4 and 5 tenths
25 divided by 5 plus 6 times the difference of 2 and 4 and 5 tenths
25 divided by 5 plus the product of 6 and 2 minus 4 and 5 tenths
Ans :-
25 divided by 5 plus 6 times 2 minus 4 and 5 tenths[tex] \: [/tex]
Solution:-
[tex] \sf{25 ÷ 5 + (6 \times 2) − 4.5}[/tex][tex] \: [/tex]
[tex] \sf{( 25 ÷ 5 ) + ( 6×2 ) - 4.5}[/tex][tex] \: [/tex]
[tex] \sf \: 5 + 12 - 4.5[/tex][tex] \: [/tex]
[tex] \sf \: 17 - 4.5[/tex][tex] \: [/tex]
[tex] \boxed{ \sf \red{ \bold{ \: 12.5 \: }}}[/tex][tex] \: [/tex]
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
hope it helps ∼
question 3 Multiply and simplify if necessary. 3.1.1 3a²bc² (3a²-4b-c)
Answer:
3a⁴bc-3a²4b²c²-3a²bc³
Step-by-step explanation:
remove brackets by multiplying by the numbers out the brackets.As they are no like terms that is where we end our answers
The roof will be covered with sheets of plywood that are 4 feet x 8 feet x 1/2
inch. Plywood is placed over the top chords of the roof trusses to form the
covering or "decking" of the roof.
How many sheets of plywood will be needed to form the decking? Include all
calculations and/or explanations necessary to support your answer.
Answer:
The length and width of the roof can be used to calculate the total square footage of the roof. For example, if the roof is 20 feet long and 10 feet wide, the total square footage would be 200 square feet.
Once the total square footage is known, the number of sheets of plywood needed can be calculated. Each sheet of plywood is 4 feet x 8 feet, or 32 square feet. Therefore, 200 square feet of roof would require (200/32 = 6.25) 6.25 sheets of plywood. In order to cover the entire roof, 7 sheets of plywood would need to be used.
Step-by-step explanation:
B
O
In the figure,
O
A
For circle O, m CD = 125° and m/ABC = 55°.
and 2
have measures equal to 35°.
Reset
Nex
∠ABO and ∠BCO equal to 35
Explanation:Measure of arc AD = 180 - measure of arc CD = 180 - 125 = 55
m∠AOB = 55 ( measure of central angle is equal to intercepted arc)
∠OAB = 90 degrees (Tangent makes an angle of 90 degrees with the radius)
In triangle AOB ,
∠AB0 = 180 - (90 + 55) = 35 degrees(angle sum property of triangle)
In triangle BOC, ∠BOC = 125,
m∠, BCO = 35 degrees
Hello! When using compelting the square, arent you just technically putting the standard form equation you have into vertex form?
Answer:
Hello! Yes, when completing the square, you are essentially transforming a quadratic equation from standard form to vertex form. The vertex form of a quadratic equation is given by:
y = a(x - h)^2 + k
where (h, k) represents the vertex of the parabola and 'a' is a constant that determines the shape and direction of the parabola.
To convert a quadratic equation from standard form (ax^2 + bx + c) to vertex form, we follow these steps:
1. Divide both sides of the equation by 'a' to make the coefficient of x^2 equal to 1.
2. Move the constant term (c/a) to the right-hand side of the equation.
3. Complete the square by adding and subtracting (b/2a)^2 on the left-hand side of the equation.
4. Factor the left-hand side of the equation as a perfect square trinomial.
5. Write the equation in vertex form by identifying the values of 'a', 'h', and 'k'.
HELP PLEASE 20PTS!!!!!!!!!!!!
Answer: -125
Step-by-step explanation:
-5*-5=25
But, because its squared you have to multiply 25 * -5
A negative times a positive is a negative so,
25 * -5 = -125
Hope this helped!
You receive a raise at work and your salary goes from $52,365 to $57,128. What percent raise did you receive? (Make sure to write your answer as a percent for example: 6.2% Round to the nearest tenth of a percent.)
Step-by-step explanation:
the initial salary is $52,365
increment = $57,128
Raise = $57,128 - $52,365 = $4,763
%raise = $4,763/$52,365 × 100
= 9.1%
Find the distance between D and E.
Find the bearing of E from D.
The distance DE is 338.25m
What are similar triangles?Similar triangles are triangles that have the same shape, but their sizes may vary. . The ratio of corresponding sides of Similar triangles are equal.
Therefore AB /DE = CB/CE
CE = 80+250
= 330
represent DE by x
82/x = 80/330
330× 82 = 80x
80x = 27060
x = 338.25
Therefore the distance DE is 338.25m
Using cosine rule to find the angle of D
c² = a²+b² +2abcos C
330² = 300²+ 338.25²+2× 300× 338.25cos D
108900 = 90000 + 114413.1 + 202950cosD
202950cos D = 108900-204413.1
202950cos D = -955131
cos D = -955131/202950
cosD = -0.471
D = cos^-1( 0.471)
D = 62° ( nearest degree)
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work out the size of angle x and work out the size of angle y
Answer:
X = 34, Y=56
Step-by-step explanation:
BOA is an isosceles triangle.
Angle CBO = 90°
Angle DBO = 90 - 56 = 34
Angle ODB = 34° and ODB is x
Angle EBD is also 90°
Y = 180 - (90+34) = 56
The value of x is 34 degree and y is 56 degree.
What is a Tangent?Tangents to circles are lines that cross the circle at a single point. Point of tangency refers to the location where a tangent and a circle converge. The circle's radius, where the tangent intersects it, is perpendicular to the tangent. Any curved form can be considered a tangent.
We have, BOA is an isosceles triangle.
< CBO = 90°
So, < DBO = 90 - 56
<DBO = 34
and, <ODB = 34°
Now, let the angle ODB be x
As, from the figure < EBD is also 90°
So, <y = 180 - (90+34) (Angle sum property)
<y = 56
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A taxpayer had a taxable income of $61,900, and her spouse had a taxable
income of $59,400. If they wish to file their tax return jointly, which tax bracket
will they fall into?
Married Filing Jointly
Taxable
income is
over
But not
over
$0
16,700
16,700
67,900
67,900 137,050
137,050 208,850
208,850 372,950
372,950
← PREVIOUS
Bracket
10%
15%
25%
28%
33%
35%
X
Answer:
The combined taxable income of the couple is $61,900 + $59,400 = $121,300. This falls in the tax bracket for Married Filing Jointly between $67,900 and $137,050. Therefore, their tax rate will be 25%.
Step-by-step explanation:
The rate of tax couple has to pay is 25 percent.
What is tax?In mathematics, the tax calculation is related to the selling price and income of taxpayers. It is a charge imposed by the government on the citizens for the collection of funds for public welfare and expenditure activities. There are two types of taxes: direct tax and indirect tax.
The combined taxable income of the couple is $61,900 + $59,400 = $121,300.
This falls in the tax bracket for Married Filing Jointly between $67,900 and $137,050.
Therefore, their tax rate will be 25%.
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Which phrase accurately describes a distribution that's bell-shaped but not symmetric?
Answer:
a normal distribution
I need help. We're learning circles and I cant get these
Applying the appropriate circle theorem, the values are:
1. x = 9; 2. Measure of arc DL = 66°; 3.x = 11; 4. x = 0; 5. x = 15
What is the Central Angle Theorem?The central angle theorem is a circle theorem that states that the measure of the central angle is the same as the measure of the arc it intercepts.
1. 63 + 44 + 7x + 10 = 180
117 + 7x = 180
7x = 180 - 117
7x = 63
x = 9
2. Measure of arc DL = 2(33) [based on the inscribed angle theorem]
Measure of arc DL = 66°
3. 9x + 3 = 1/2(154 + 50) [based on the angle of intersecting chords theorem]
Solve for x:
9x + 3 = 102
9x = 102 - 3
9x = 99
x = 11
4. 35 = 1/2(171 + 2x - 101) [based on the secant-tangent theore]
Solve for x:
70 = 2x + 70
70 - 70 = 2x
2x = 0
x = 0
5. 8 * x = 12 * 10 [based on the intersecting chords theorem]
8x = 120
x = 15
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9x9x9x9x9x9x9( write in exponential form)
Im quite confused in this topic
tyler's playlist has 36 songs. noah's playlist has one quater as many songs as tyler's plaslist. how many songs are on noahs playlist?
According to the question, Tyler's playlist has 36 songs. Noah's playlist has one-quarter as many songs as Tyler's playlist. then Noah's playlist has 9 songs.
Let the number of songs on Noah's playlist be represented by x.
To solve the question, we'll set up an equation, which is given as:
36 / 4 = x
Simplifying the above equation we get:
9 = x
Therefore, Noah's playlist has 9 songs.
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Which angle measure appears to be the
smallest in AJKL? What can you conclude
about the side opposite that angle?
if you are going to receive $2,000 in six years from now, how much is that worth today, assuming 5 nnual simple interest? review later $1,538.46 $1,780.32 $1,904.76 $2,600.00
The initial amount is worth $ 1538.46
Simple interest:Simple interest is a type of interest that is calculated only on the principal amount of a loan or investment, without taking into account any additional interest that may be added over time.
Simple interest is calculated as a percentage of the principal amount and is usually expressed as an annual rate.
The formula to calculate simple interest is:
Simple Interest = Principal x Rate x Time/ 100
Here we have
You are going to receive $2,000 in 6 years from now
The annual simple interest rate is 5%
Let 'P' be the initial or principal amount
Using the formula, I = PTR/100
Simple interest will gain on 'P' at 5% for 6 years
=> I = P(6)(5)/100
=> I = 0.3P
And total amount = P + 0.3P = 1.3P
It is given that after 6 years we get $ 2000
=> 1.3P = 2000
=> P = 1538.46
Therefore,
The initial amount is worth $ 1538.46
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Find the value of X
(2x+60) 6x°
Answer:
x=15
Step-by-step explanation:
(2x+60)=6x
2x+60=6x
subtract 2x from both sides
60=4x
divide by 4
15=x
47 feet wide how many yards and feet is that.
pls show your work thanks....................?
Answer:
15 yards and 2 feet
Step-by-step explanation:
There are 3 feet in a yard
47/3= 15 and R 2
15 yard and 2 feet
The total expenditure is R1 149 390bn,calculate the total amount allocated to the Department of Health which is 12. 6%
The total amount allocated to the Department of Health is R145,026,540,000, calculated by multiplying the total expenditure by the percentage allocated to the department expressed as a decimal.
To calculate the total amount allocated to the Department of Health, we need to multiply the total expenditure by the percentage allocated to the department, which is 12.6%.
Then, we must divide the percentage by 100 to get the decimal equivalent:
12.6/100 = 0.126
Next, we can calculate the total amount allocated to the Department of Health by multiplying the total expenditure by the decimal equivalent of the percentage:
Total amount allocated to the Department of Health = 0.126 x R1 149 390bn
Simplifying this expression, we get:
Total amount allocated to the Department of Health = R145,026,540,000
Therefore, the total amount allocated to the Department of Health is R145,026,540,000.
The calculation involves multiplying the total expenditure by the decimal equivalent of the percentage allocated to the department, which gives the amount allocated to the Department of Health.
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Marbles There are 70 marbles in the bag. The bag has 31 green marbles, 27 red marbles, and 12 yellow marbles. Silas selects a marble from the bag 20 times, and of those he picks
a red marble 12 times. What is the experimental probability of selecting a red marble? What is the theoretical probability of selecting a red marble?
The experimental probability of selecting a red marble is
(Type an integer or a simplified fraction.)
The experimental probability of selecting a red marble is 12/20, which simplifies to 3/5 or 0.6 as a decimal.
The theoretical probability of selecting a red marble can be calculated by dividing the number of red marbles by the total number of marbles:
P(red) = number of red marbles / total number of marbles
In this case, there are 27 red marbles out of 70 total marbles:
P(red) = 27/70
Therefore, the theoretical probability of selecting a red marble is 27/70, which cannot be simplified further as a fraction. As a decimal, it is approximately 0.386.
3 out of every 7 trucks on the road are followed by a car, while 3 out of every 9 cars are followed by a truck. what fraction of vehicles on the road are trucks?
The fraction of vehicles on the road are trucks is 3/7
Let's assume there are a total of x vehicles on the road.
According to the first statement, 3/7 of those vehicles are trucks followed by a car. This means that (3/7)x trucks are on the road and are followed by a car.
According to the second statement, 3/9 of the vehicles are cars followed by a truck. This means that (3/9)x cars are on the road and are followed by a truck.
We know that the total number of vehicles on the road is x. So we can write
(3/7)x + (3/9)x = x
Simplifying this equation
(27/63)x + (21/63)x = x
(48/63)x = x
We can then solve for x
x = 63
So there are 63 vehicles on the road.
To find out what fraction of vehicles on the road are trucks, we need to determine what fraction of those 63 vehicles are trucks.
According to the first statement, 3/7 of the vehicles are trucks followed by a car.
So the fraction of vehicles that are trucks is 3/7
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Do all rational and irrational numbers have decimal expansions?
Yes, all rational and irrational numbers have decimal expansions. Rational numbers can be expressed as terminating or repeating decimals, while irrational numbers have non-repeating, non-terminating decimal expansions.
In decimal form, rational numbers have a finite or repeating pattern of digits after the decimal point, while irrational numbers have an infinite, non-repeating pattern of digits after the decimal point. For example, the rational number 1/4 is expressed as 0.25, while the irrational number pi is expressed as 3.14159265358979323846... where the decimal goes on infinitely without repeating. In conclusion, every real number can be represented in decimal form, either as a terminating or repeating decimal, or as a non-repeating, non-terminating decimal.
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kaleb and gage are waiting to get a rebound during a basketball game. if the height of the basketball hoop is 10 feet, the angle of elevation between kaleb and the goal is 40o , and the angle of elevation between gage and the goal is 30o. how far apart are kaleb and gage standing? (round to the nearest hundredth.)
Kaleb and Gage are standing approximately 12.72 feet apart from each other based on their angles of elevation to a basketball hoop that is 10 feet high.
Let's assume that Kaleb and Gage are standing on the same line perpendicular to the basketball hoop. Let's also assume that the distance between Kaleb and the hoop is x, and the distance between Gage and the hoop is y.
Using trigonometry, we can set up two equations based on the angles of elevation:
tan(40) = 10/x
tan(30) = 10/y
Solving for x and y:
x = 10/tan(40) ≈ 12.72 feet
y = 10/tan(30) ≈ 17.32 feet
Therefore, Kaleb and Gage are standing approximately 12.72 feet apart.
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help.
math hurts my brain.
Answer:
Step-by-step explanation:
Marissa spent $45 on a hat and a shirt.
The hat cost $10. What is x, the cost of
the shirt in dollars? What is the answer
Answer:
To determine the cost of the shirt, we can set up an equation using algebra. Let x be the cost of the shirt in dollars. We know that Marissa spent a total of 45 on the hat and the shirt, and the hat cost 10. Therefore, we can write the equation:
x + 10 = 45
To solve for x, we need to isolate it on one side of the equation. We can do this by subtracting 10 from both sides:
x = 35
Thus, the cost of the shirt is $35.