The use of electricity in the US in 1902 was 6.03 x 10^9 kilowatt-hours.
The use of electricity in the US in 1950 was 4.3 x 10^11 kilowatt-hours.
How many times more was the electricity used in 1950 than 1902? Express your answer in Scientific Notation.
a. 7.131 x 10
b. 10.33 x 10^20
c. 1.73 x 10^2
d. 2.6 x 10^20
Using scientific notation , the electricity used in 1950 was 7.131 × 10¹ times more than that used in 1902 .
Values that are either too huge or too little to be conveniently expressed in decimal form can be expressed using scientific notation (typically would result in a long string of digits). It is also referred to as scientific form, standard index form, and standard form in the UK. This base ten notation is often used by scientists, mathematicians, and engineers because it can make various mathematical procedures easier.
One can represent exceedingly large or extremely small quantities using scientific notation. In scientific notation, the result of multiplying an integer between 1 and 10 by a power of 10 is written. For instance, in scientific notation, 35,000,000 can be written as 3.5× 10⁷.
Given that the use of electricity in the US in 1902 was 6.03 x 10⁹kilowatt-hours and the use of electricity in the US in 1950 was 4.3 x 10¹¹ kilowatt-hours.
These are both represented in scientific notation.
Now we have to divide to find the number of times more electricity is used.
(4.3 x 10¹¹) ÷ (6.03 x 10⁹)
= 71.31011...
≈ 7.131 × 10¹
Hence the scientific representation is given by 7.131 × 10¹ times.
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What is the greatest common factor of 44 and 22?
Answer:
The greatest common factor of 44 and 22 is 22.
Step-by-step explanation:
First, you should list all the factors of 44 and 22. For 44, the factors are: 1, 2, 4, 11, 22 and 44
For 22, the factors are: 1, 2, 11 and 22
The greatest common factor is 22.
Answer: 22
Step-by-step explanation:
In order to find GCF of 44 and 22, take the prime factorization of the two numbers
22: 11*2
44: 11*4=11*2*2
Notice they both have 11*2 in their prime factorization.
11*2=22
GCF of 44 and 22 is 22
Subtract -2x^2-2x-7−2x
2
−2x−7 from 2x^{2}+72x
2
+7.
Answer:
-78x² - 4x^-7 + 7
Step-by-step explanation:
we compute using mathematical rules
-2x^2- 2x^-7 -2x^2-2x^-7 - (2x^2 +72x^2+7)
-4x^2-4x^-7-2x^2-72x^2-7
= -78x² - 4x^-7 + 7
The subtraction of the polynomial - 2x² - 2x - 7 from 2x² + 7 will be 4x² + 2x + 14.
What is Algebra?Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.
The definition of simplicity is making something simpler to achieve or grasp while also making it a little less difficult.
The expressions are given below.
- 2x² - 2x - 7 and 2x² + 7
Subtract - 2x² - 2x - 7 from 2x² + 7, then we have
⇒ (2x² + 7) - (- 2x² - 2x - 7)
⇒ 2x² + 7 + 2x² + 2x + 7
⇒ 4x² + 2x + 14
The subtraction of the polynomial - 2x² - 2x - 7 from 2x² + 7 will be 4x² + 2x + 14.
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image below, what are the domains and ranges?
Answer:
1. domain: -6 ≤ x ≤ 7
range: -6 ≤ y ≤ 4
2. domain: 5 > x
range: -5 < y
Step-by-step explanation:
1. domain: the farthest number left that the line reaches is -6, while the farthest right is 7. due to the line being closed as well as the points being filled in, you use the less than or equal to sign.
range: the farthest number down that the line reaches is -6, while the farthest is goes up is 4. again, since the points are filled in, you use the "or equal to" sign.
2. domain: since the only plotted point is 5, and the point is not filled in, you would say that 5 is greater than x due to the direction that the line moves
range: the lowest part of the line touches -5 and only goes up from there, therefore y is greater than -5
An isosceles triangle has at least two congruent sides. The perimeter of a certain isosceles triangle is at
most 12 in. The length of each of the two congruent sides is 5 in. What are the possible lengths of the
remaining side?
x ≤ 2 but must be greater than 0 . triangles are the possible lengths of the remaining side.
How is an isosceles triangle defined?
Any triangle with (at least) two equal sides is said to be isosceles. The remaining side in the illustration has length in addition to the two equal sides. This characteristic equates to the triangle's two angles being equal.The length of one of the congruent side is 5
The total length of two congruent sides is 10
Perimeter at the most is 12 (meaning the maximum length of perimeter is 12)
The third side of the triangle must be 12-10 = 2 at the most
Writing this requirement as inequality we have
x ≤ 2 but must be greater than 0
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17+|-12--5|--6
show how you got the answer
Answer:
I'm assuming the double minus marks meant 5 and 6 were negative. Answer is 30.
Step-by-step explanation:
[tex]17+\abs(-12--5)-(-6)\\17+\abs(-12+5)-(-6)\\17+\abs(-7)-(-6)\\17+7-(-6)\\17+7--6\\24--6\\24+6\\30[/tex]
Answer:The answer would be 28
Step-by-step explanation:17-6 is 11
The absolute value of -12-5 is 17
17+11=28
So therefore the answer would be 28.
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GO Practice
Spiral Review Extra Practice
2. The table shows the time it took for Javier to
complete one repetition of different
exercises during his Monday workout.
.
Exercise
Squats 0.08
Crunches 0.03
Lunges 0.04
Curts 0.05
Javier likes to work out for 1 hour. If he
doesn't use the full hour on his exercises, he
runs on a treadmill for the remaining time. If
he completed 3 repetitions of each exercise,
how long did he run on the treadmill on
Monday? I need explication step bu step
Using the addition of all the exercise, Javier runs on the treadmill on Monday is 0.40 hours.
What is addition?Addition is one of the mathematical operations. The addition of two numbers results in the total amount of the combined value.
Given that Javier completed 3 repetitions of each exercise. thus by multiplication time taken by Javier to complete each exercise is as follows;
Squats = 0.8 x 3= 0.24 hour
Crunches = 0.03 x 3 = 0.09 hour
Lunges = 0.04 x 3 = 0.12 hour
curls = 0.05 x 3 = 0.15 hour
we can calculate the total time taken to complete all exercises as;
0.24 + 0.09 + 0.12 + 0.15
= 0.60 hour
Now the time took on treadmill by Javier;
1 hour - 0.60 hour
0.40 hour
Hence, If he completed 3 repetitions of each exercise, then he run 0.40 hours on the treadmill on Monday.
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Jerald is having drain issues at his home and decides to call a plumber. The plumber charges $65 to come to his house and $55 for every hour they work. If the plumber charges Jerald a total of $296, how many hours did the plumber work? Write and solve an equation to determine the number of hours worked by the plumber.
A 55x − 65 = 296; x = 6.6 hours
B 55x + 65 = 296; x = 4.2 hours
C 65x − 55 = 296; x = 5.4 hours
D 65x + 55 = 296; x = 3.7 hours
Answer:
B 55x + 65 = 296; x = 4.2 hours
Step-by-step explanation:
The equation to determine the number of hours worked by the plumber is 65 + 55x = 296.
The number of hours worked by the plumber is 4.2
Option B is the correct answer.
What is an equation?An equation is a mathematical statement that is made up of two expressions connected by an equal sign.
We have,
Charges for home visit = $65
Charges for each hour = $55
Let the number of hours = x
Total charges = $296
We can make an equation:
65 + 55x = 296
The number of hours can be calculated.
65 + 55x = 296
Subtracting 65 on both sides.
65 + 55x - 65 = 296 - 65
55x = 231
Dividing both sides by 55.
x = 231 / 55
x = 4.2
Thus,
The equation to determine the number of hours worked by the plumber is 65 + 55x = 296.
The number of hours worked by the plumber is 4.2
Option B is the correct answer.
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there are 8 fluid ounces in 1 cup if you double the amount of fluid ounces will the amount of cups also double?
Yes , if we double the no. of fluid ounces then , the amount of cups will double also.
It is given that there are 8 fluid ounces in 1 cup.
We have to check does the amount of cups gets doubled , if we double the amount of fluid ounces.
What do you mean by unitary methods ?
The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.
As per the question ;
In 1 cup , no. of fluid ounces = 8
So ;
If we double , the no. of fluid ounces , i.e.,
= 8 × 2
= 16
Then ;
The no. of cup will be equal to
= 16 ÷ 8
= 2 cups
Thus , if we double the no. of fluid ounces then , the amount of cups will double also.
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Data was collected for 300 fish from the North Atlantic. The length of the fish (in mm) is summarized in the
GFDT below.
Lengths (mm)
Frequency
220 - 229
1
230 239
16
240 - 249
71
250 - 259
108
260 - 269
83
270 - 279
18
280 289
3
What is the lower class boundary for the first class?
class boundary =
Answer:
330-339
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in the month of januray, i were able to sell 1,200 desserts. In februaryc, your dessert sales increased to 1,500. What is the percent of change
The increment in the percentage of dessert sales will be 25%.
What is the percentage?The quantity of anything is stated as though it were a fraction of a hundred. A quarter of 100 can be used to express the ratio. Per 100 is what the term percent signifies. The symbol ‘%’ is used to symbolize it.
The percentage is given as,
Percentage (P) = [Final value - Initial value] / Initial value x 100
I was able to sell 1,200 desserts throughout the month of January. Your dessert sales jumped to 1,500 in February.
Then the increment in the percentage will be given as,
P = [(1500 - 1200) / 1200] x 100
P = (300 / 1200) x 100
P = 0.25 x 100
P = 25%
The increment in the percentage of dessert sales will be 25%.
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10 ≤ 3x + 4 < 25
How do I solve
Answer: 2 ≤ x < 7
Step-by-step explanation:
10 ≤ 3x + 4 < 25 ==> solve for x, so work to isolate the x variable
10-4 ≤ 3x + 4-4 < 25-4
6 ≤ 3x < 21
6/3 ≤ 3x/3 < 21/3
2 ≤ x < 7
Answer:
I believe it's [2, 7). It has to be solve differently.
Find the distance between
the two points rounding to the nearest tenth (if necessary).
(8, 7) and (1, -2)
Answer: 11.4
Step-by-step explanation:
Laura invests £1290 in a bank account.
The account gathers compound interest at a rate of
0.5% per month.
How much money will be in the account after 8 months?
Give your answer in pounds to the nearest 1p.
Answer: £1342.5
Step-by-step explanation:
y = a(1 + R)^n
y = 1290(1 + 0.005)^8
y ≈ 1342.51
∴ £1342.5
a box has four cards numbered 1, 2, 3, and 4. greg will toss a coin once and record the toss as heads (h) or tails (t). then he will randomly pick a card from the box and record the number chosen. give the sample space describing all possible outcomes. then give all of the outcomes for the event that the number chosen is 3. use the format h1 to mean that the coin toss is heads and the number chosen is 1. if there is more than one element in the set, separate them with commas.
Sample space when a coin is tossed is {H, T}
Sample space for drawing a card is {1, 2, 3, 4}
Sample space = {H1, H2, H3, H4, T1, T2, T3, T4}
Event that the coin toss is tails = {H1, H2, H3, H4}
The sample space describing all possible outcomes are (H1, H2, H3, H4, T1, T2, T3, T4).
What do you mean by fair coin?A series of independent Bernoulli trials with a chance of 1/2 on each trial is referred to as a fair coin in probability theory and statistics. A biased or unjust coin is one for which the probability is not equal to one-half.
The presumption that a coin is fair is sometimes made by making reference to an ideal coin in theoretical investigations. When John Edmund Kerrich experimented with flipping coins, he discovered that 679 times out of 1000, a coin fashioned of a wooden disc the size of a crown that was coated with lead on one side landed heads (wooden side up).
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give an example of 2 inequalities that are equivalent inequalities
-4x < or = to -1 and x > or = 1/4
Explation
-4x/4 < or = to -1/-4 x > or = to 1/4What kind of transformation is illustrated in this figure?
dilation
translation
reflection
rotation
Answer:
I would say it would be a translation transformation.
Step-by-step explanation:
Why would I say it would translation? Well, for starters; translation is the only one that would make sense (though, reflection could be the second best answer; but not the correct answer [explanation later]). Dilation doesn't make sense because it's not scaling from either bigger to smaller; from the picture. Translation makes sense because it goes from a different location, keeping its original state. As I said at the beginning, reflection could be the second best answer if it weren't for its mirroring action (it's reversed); making it not an available option for this question. Lastly, rotation definitely could not be correct because it's not rotating at all.
Therefore, translation would be the most viable option in this question.
I WILL GIVE BRAINLIEST!!!
Please help me.
Translate all word problems into equations.
You only need to give equation+answer for number 7 and 9.
7. Between noon and midnight, the temperature
dropped 20°F. If the temperature was -8°F at
midnight, what was the temperature at noon?
8. If a strawberry pie is divided into 6 equal slices, each
slice has 240 calories. How many calories are in the
whole pie?
9. A chest was resting on the ocean floor 1000 ft below
the surface. It was lifted to the deck of a ship 8 ft
above the surface. How far was the chest lifted?
10. When all the kids who tried out for Little League
were divided into teams of 20 players, there were
exactly 8 teams. How many kids tried out?
Step-by-step explanation: They are word problems into equations. Have a good night. you will get them right.
7.) x - 20 = -8
8.) x/6 = 240
9.) - 1000 + x = 8
10.) x/20 = 8
Which system of linear inequalities is represented by the graph?
y > x – 2 and y < x + 1
y < x – 2 and y > x + 1
y < x – 2 and y > x + 1
y > x – 2 and y < x +
The system of linear inequalities is represented by the graph is y > x – 2 and y < x + 1.
What is inequality?A statement of an order relationship-greater than, greater than or equal to, less than, less than or equal to- between two numbers or algebraic equations.
The given options are,
y > x – 2 and y < x + 1
y < x – 2 and y > x + 1
y < x – 2 and y > x + 1
y > x – 2 and y < x + 1
Since,
The linear equation of a straight line is
y = mx + c,
where m is the gradient or slope, and
y = c is the value where the line cuts the y-axis.
The formula for slope of line with points (x1,y1) and (x2,y2) can be expressed as,
m = (y2 - y1) / (x2 - x1)
Now from y > x – 2 and y < x + 1
the first line passes through (0, 1) and (0, -1)
So,slope m = (0 - 1) / (0 - 1)
⇒ m = 1
Now the line intercept y-axis at (1, 1)
So, c = 1
So,equation of line is given as,
y < x + 1
the second line passes through (0, 2) and (0, -2)
So,slope m = (0 - 2) / (0 - 2)
⇒ m = 1
Now the line intercept y-axis at (-2, 0)
So, c = -2
So,equation of line is given as,
y < x - 2
So, we get y > x – 2 and y < x + 1.
Thus, the system of linear inequalities is represented by the graph is y > x – 2 and y < x + 1.
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The missing graph of the question is attached.
A cone has a volume of 98 cm3.
The radius of the cone is 5.13 cm.
Work out an estimate for the height of the cone.
Answer:
h=3.6cm
Step-by-step explanation:
v=1/3πr^2h
input your values
98=1/3×22/7×5.13×5.13×h
98=(22*5.13*5.13*h)/21
cross multiply
98*21=22*5.13*5.13*h
2058=22*5.13*5.13*h/22*5.13*5.13
3.6cm=h
please mark brainliest, hope it helps
State what additional information is required in order to know that the triangles are congruent by the SSS Triangle Congruence Postulate
Answer:
E
Step-by-step explanation:
You already know that TS = AB and TU = BC because it shows that in the images using the tick marks. SSS Triangle Congruence Postulate is when two triangles are congruent to each other because all the corresponding side lengths are equal to each other. So we already have two side lengths that are equal to each other, and, in order for SSS to be true, we need all 3 side lengths to be equal to each other. The only two side lengths not equal to each other yet are US and CA so if those were to be equal to each other, all corresponding side lengths would be equal to each other.
Let me know if you have any questions.
Nora left her house and drove to the store. She stopped and Went inside . From there, she drove in the same direction until she got to the bank. She stopped it and went inside the bank. Then she drove home. The graph below shows the number of blocks away from home Nora in X minutes after after she left her house, until she got back home. How long was Nora in the bank
find the length s of the arc that subtends a central angle of measure 6 rad in a circle of radius 4 cm.
The length of the arc for the given circle is 24cm.
What is the length of an arc of a circle?The Arc length refers to the distance between two points on a section of a curve or a circle.Length of the arc (L) = r Θ, where r = radius of the curve, Θ = angle subtended by the arc at the centre of the curve in radians.Given:
Angle = 6 radians = ΘRadius of circle = 4cm = rTo find: Length of the arc.
Finding:
On substituting the values of r and Θ in the formula of length of the arc, we get:
L = 4(6) = 24 cm.
Hence, the length of the arc for the given circle is 24cm.
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Which expression is equivalent to
3√50 x √22
[tex]{ \qquad\qquad\huge\underline{{\sf Answer}}} [/tex]
lets solve ~
[tex]\qquad \sf \dashrightarrow \: 3 \sqrt{50} \times \sqrt{22} [/tex]
[tex]\qquad \sf \dashrightarrow \: 3 \sqrt{2 \times 5 \times 5} \times \sqrt{2 \times 11} [/tex]
[tex]\qquad \sf \dashrightarrow \: 3 \sqrt{2 \times 2 \times 5 \times 5 \times 11} [/tex]
[tex]\qquad \sf \dashrightarrow \: 3 \times 2 \times 5 \times \sqrt{11} [/tex]
[tex]\qquad \sf \dashrightarrow \: 30 \sqrt{11} [/tex]
A chemistry experiment calls for a 30% solution of copper sulfate. Kendra has 40 milliliters of 25% solution. How many milliliters of 60% solution should she add to make a 30% solution?
Answer:
x = 20/3
you will need 20/3 of the 60% solution
Step-by-step explanation:
0.25(40) + 0.60x = 0.30(x + 40)
10 + 0.60x = 0.30x + 12
0.30x = 2
Not sure if it's right
is this a function or not explain why
question 10(multiple choice worth 1 points) (01.01 lc) what is the rational number equivalent to 1 point 28 with a bar over 28? 1 and 6 over 97 1 and 28 over 99 1 and 8 over 33 1 and 5 over 16
The rational number equivalent to 1.28 bar over 28 is 1and 28 over 99 that is option 2) is correct
The number that we have been given is 1.28 bar over 28 that is 28 is repeating.
Now we have to convert it into simple fraction.
For we will first denote,
X = 1.28 bar over 28
Multiplying both side by 100 as two digits are being repeated we get,
100X = 128.2828…
Now subtracting it from X on both side s and putting the value of X we get
100X – X = 128.28… - 1.2828….
99X = 127
X =127/99
X = 1 28/99
Hence the rational number equivalent to 1.28 bar over 28 is 1and 28 over 99 that is option 2) is correct
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Help If u can please show ur work thank you
Answer:
Step-by-step explanation:
Tim (t), isaac (i), and hannah (h) all sell individual insurance policies. isaac sells four times as much as tim, and hannah sells three times as much as isaac. create an equation in terms of tim (t) in order to find the portion he sells.
Using proportions, the equation in terms of Tim is given by:
T(t) = 17t.
What is a proportion?A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct(when both increase or both decrease) or inverse proportional(when one increases and the other decreases, or vice versa), can be built to find the desired measures in the problem, or equations to find these measures.
For this problem, we have that:
Isaac sells four times as much as Tim, hence I = 4t.Hannah sells three times as much as Isaac, hence H = 3I = 3 x 4t = 12t.Hence the total amount, as a function of Isaac's amount, is given by:
T(t) = I + H + t
T(t) = 4t + 12t + t
T(t) = 17t.
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The graph above displays the total cost C, in dollars, of renting a boat for h hours.
What does the C-intercept represent in the graph?
Based on the graph which displays the total cost C, in dollars, of renting a boat for h hours, the c-intercept represents A. The initial cost of renting the boat.
What is the purpose of the y-intercept?The y-intercept is a value that represents the point on a chart where the line intersects with the y-axis. In the above chart, the y-intercept is 5 dollars.
The purpose of the y-intercept is to tell us the initial cost of renting the boat in this instance, before the boat has been used for any number of hours. This is because at the y-intercept, x would be 0 which means that the number of hours would be zero.
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