Statistics question, please explain what type of problem it is and how to do it

In a group of 60 students; 30 go for extra help and 22 study at home only. Find the probability that a person picked from this group at random is either going for extra help or only studying at home?

Answer:

Mai is correct. We can use exponential notation to represent the number of coins each day. Let's call the number of coins on the first day "1". Then the number of coins on each subsequent day is twice the number of coins on the previous day. So we have:

Day 1: 1

Day 2: 2 = 2^1

Day 3: 4 = 2^2

Day 4: 8 = 2^3

...

Day n: 2^(n-1)

To find the number of coins Mai has on the 6th day, we substitute n = 6 into the formula for the number of coins:

Day 6: 2^(6-1) = 2^5 = 32

So Mai has 32 coins on the 6th day. Writing out the product of 2's (1.2.2.2.2.2.2) is equivalent to writing 2^6 = 32.

To find out how many coins Mai has after 28 days, we substitute n = 28 into the formula for the number of coins:

Day 28: 2^(28-1) = 2^27 = 134,217,728

So after 28 days, Mai has 134,217,728 coins.

Answer:

Assuming that the expression is meant to be written as:

(a^5 ⋅ 2^3)^3

We can simplify it using the rules of exponents. First, we can simplify the expression inside the parentheses:

a^5 ⋅ 2^3 = a^5 ⋅ 8 = 8a^5

Now we can substitute this simplified expression into the original expression:

(8a^5)^3

To simplify this, we use the power rule of exponents, which states that when we raise a power to another power, we multiply the exponents:

(8a^5)^3 = 8^3 ⋅ (a^5)^3 = 512a^15

Therefore, the simplified expression is 512a^15.

The graph of the equation x^2/49 + (y + 1)^2/4 = 1 is added as an attachment

The expression that represents the function in words is given as

StartFraction x squared Over 49 EndFraction + StartFraction (y + 1) squared Over 4 EndFraction = 1

Express the equation properly

So, we have

x^2/49 + (y + 1)^2/4 = 1

The above equation is an ellipse

Next, we plot the graph on a coordinate plane using a graphing tool

See attachment for the graph of the equation

Read more about ellipse at

https://brainly.com/question/29187465

#SPJ1

Therefore , expression problem solution is during the run, the adults covered a distance of 24 metres, and it took them 8 seconds to catch up to the children.

There is a need for mathematical operations like multiplying, splitting, combining, and now even deleting. If they were combined, it would be said that: A mathematical formula, some data, and an equation A declaration of truth is composed of values, elements, and mathematical operations like additions, subtractions, missteps, algebraic formulas, and divisions. It is possible to evaluate and analyse words and phrases.

Here,

Distance is determined by rate and duration.

for the distances that children and adults travel, two equations should be made up:

=> (d - 16) = 1t (for the youngsters) (for the kids)

=> d = 3t (for the males) (for the adults)

where "t" represents the amount of time that has elapsed since the competition began.

We can set the distances between the children and adults to be equal because we know that they were side-by-side at some time during the race:

=> d - 16 = 3t - 16

When we simplify this solution, we obtain:

=> d = 3t

When we add this to the prior solution, we obtain:

=> 3t - 16 = 1t

To solve for "t," we obtain:

=>  t = 8 sec.

Now that we know how far the grownups travelled:

D=3t=3x8=24 metres.

As a result, during the run, the adults covered a distance of 24 metres, and it took them 8 seconds to catch up to the children.

To know more about expressions visit :-

brainly.com/question/14083225

#SPJ1

The 6th term of the sequence is -97.65625

From the question, we have the following parameters that can be used in our computation:

A(n) = -2.5^(n-1)

In the sixth term, we have

n = 6

Substitute the known values in the above equation, so, we have the following representation

A(6) = -2.5^(6-1)

Evaluate

A(6) = -97.65625

Hence, the 6th term is -97.65625

Read more about sequence at

https://brainly.com/question/29431864

#SPJ1

Answer:

An exponential function in the form of y = a(m) x is of the form:

y = a * m^x

where "a" is a constant, "m" is a positive constant (the base of the exponential), and "x" is the independent variable.

To determine the exponential function in this form, you need to have some information about the function, such as its value at a particular point or its rate of growth.

Here are the general steps to determine the exponential function in the form of y = a(m) x:

Determine the value of "a" by plugging in the known value of "y" and "x" into the equation.

Determine the value of "m" by solving for it using the given information.

For example, let's say you are given that the function passes through the point (2, 8) and has a growth rate of 3. To determine the exponential function in the form of y = a(m) x, you would follow these steps:

Plug in the values of x and y into the equation:

8 = a * m^2

Solve for "a" by isolating it on one side of the equation:

a = 8 / m^2

Use the given growth rate of 3 to find the value of "m":

m = 1 + r = 1 + 0.03 = 1.03

Plug in the value of "m" and the value of "a" you found in step 2 into the equation:

y = (8 / 1.03^2) * 1.03^x

Simplifying this equation gives:

y = 7.514 * 1.03^x

So the exponential function in the form of y = a(m) x that passes through the point (2, 8) and has a growth rate of 3 is y = 7.514 * 1.03^x.

Step-by-step explanation:

here is a more detailed explanation of the steps involved in determining an exponential function in the form of y = a(m) x:

Determine the value of "a" by plugging in the known value of "y" and "x" into the equation.

In the equation y = a(m) x, "a" is a constant that represents the value of y when x is equal to 0. So to find the value of "a", we need to know the value of y for a specific value of x, other than 0.

The amount of dry cells that are taken from the full container is 473.

To find the total number of dry cells taken from the full container, we need to add up the number of dry cells placed in the stockroom, on the shelf, and sold to customers. We can use the following equation:

  Total dry cells taken = Dry cells in stockroom + Dry cells on shelf + Dry cells sold to customers

Plugging in the given values, we get:

  Total dry cells taken = 325 + 45 + 18 + 25 + 30 + 24 + 6

Using the order of operations, we can simplify the equation:

Total dry cells taken = 325 + 45 + 18 + 25 + 30 + 24 + 6
Total dry cells taken = 370 + 18 + 25 + 30 + 24 + 6
Total dry cells taken = 388 + 25 + 30 + 24 + 6
Total dry cells taken = 413 + 30 + 24 + 6
Total dry cells taken = 443 + 24 + 6
Total dry cells taken = 467 + 6
Total dry cells taken = 473

Learn more about union in math at https://brainly.com/question/28278437

#SPJ11

The account will be growing by $741.87 per year 11 years from now.

To find the answer, we need to use the formula for compound interest, which is A = P(1 + r/n)^(nt), where A is the final amount, P is the principal amount, r is the annual interest rate, n is the number of times interest is compounded per year, and t is the number of years.

In this case, P = $2000, r = 0.03, n = 1, and t = 11. Plugging these values into the formula gives us:
A = $2000(1 + 0.03/1)^(1*11)
A = $2000(1.03)^11
A = $2741.87
To find out how fast the account will be growing 11 years from now, we need to subtract the principal amount from the final amount:
$2741.87 - $2000 = $741.87

Therefore, the account will be growing by $741.87 per year 11 years from now.

You can read more about compound interest at https://brainly.com/question/28020457

#SPJ11

The volume of the cylinder is 42080.87 cubic yd

Cylinder is a 3-dimensional solid shape that consists of two identical and parallel bases linked by a curved surface.It has two curved edges, one curved surface, and two flat faces.

Volume of a cylinder = π * r^2 * h

Where π = 3.14

r = 17.2 td

h = 45.3 yd

Volume of a cylinder = 3.14 * (17.2)^2 * 45.3

Volume = 3.14 * 295.84 * 45.3

Volume = 42080.87 cubic yard

Read more about Cylinder

https://brainly.com/question/28795691

#SPJ1

To find the function values, we need to substitute the given values of x into the function:

a) f(2) = 95(0.84)^2 ≈ 66.96

This means that after 2 hours, there are approximately 66.96 milligrams of medicine remaining in the person's bloodstream.

b) f(6) = 95(0.84)^6 ≈ 35.33

This means that after 6 hours, there are approximately 35.33 milligrams of medicine remaining in the person's bloodstream.

To determine an appropriate domain for the function, we need to consider the context of the problem. The function represents the amount of medicine remaining in a person's bloodstream after taking a dose of medication, so the domain should be the set of non-negative real numbers, since the amount of medicine cannot be negative and time cannot be negative. Therefore, an appropriate domain for the function is [0, ∞).

Interpretation: The function f(x) = 95(0.84)^x models the amount of medicine, in milligrams, remaining in a person's bloodstream after x hours of taking the medication. For example, after 2 hours, there are approximately 66.96 milligrams of medicine remaining in the person's bloodstream.

After taking a dose of medication, the amount of medicine remaining in a person's bloodstream, in milligrams, after x hours can be modeled by the function

To find:

Interpret the given function values and determine an appropriate domain for the function.

Solution:

The general form of an exponential function is

Where, a is the initial value, 0<b<1 is decay factor and b>1 is growth factor.

We have,

Here, 110 is the initial value and 0.83 is the decay factor.

It means, the amount of medicine in the person's bloodstream after taking the dose is 110 milligrams and the amount of medicine decreasing in the person's bloodstream with the decay factor 0.83 or decreasing at the rate of (1-0.83)=0.17=17%.

We know that an exponential function is defined for all real values of x but the time cannot be negative. So, x must be non negative.

We know that  for any value of x. So,  for all values of x.

Therefore, domain of the function is  and the range is .

Hope this helps!!!

GTPex-

The sign of each of the functions in the given interval is positive.

Suppose \( \theta \) is in the interval \( \left(90^{\circ}, 180^{\circ}\right) \), we can find the sign of each of the following functions by using the unit circle and the reference angles.

77. \( \cos \frac{\theta}{2} \)
Since \( \theta \) is in the second quadrant, \( \frac{\theta}{2} \) will be in the first quadrant. Therefore, the sign of \( \cos \frac{\theta}{2} \) will be positive.

78. \( \sin \frac{\theta}{2} \)
Similarly, since \( \theta \) is in the second quadrant, \( \frac{\theta}{2} \) will be in the first quadrant. Therefore, the sign of \( \sin \frac{\theta}{2} \) will be positive.

79. \( \sec \frac{\theta}{2} \)
The secant function is the reciprocal of the cosine function, so the sign of \( \sec \frac{\theta}{2} \) will be the same as the sign of \( \cos \frac{\theta}{2} \), which is positive.

In conclusion, the sign of each of the functions in the given interval is positive.

Learn more about reference angles

brainly.com/question/1603873

#SPJ11

The calculated system of inequalities shown in the graph of inequalities is x  > -2 and y < 4

A system of inequalities is a set of two or more inequalities involving one or more variables.

The variables can take on different values that satisfy the given inequalities simultaneously.

By the above analysis, the inequalities shown in the graph is x > -2 and y < 4

Find out more on inequalities:

https://brainly.com/question/30390162

#SPJ1

The requried measure of the PQ in the triangle PQT is 16 in.

Similar triangles are those triangles that have similar properties,i.e. angles and proportionality of sides.

Here,
A figure of triangles has been shown, ΔPQT and ΔORS.
We have to determine the measure of side PQ.

Since the given triangle is similar to one another, we can apply the property of proportionality between the similar triangles. By which:

PR/PQ = RS/QT
PQ + 4 / PQ = 10/8
8PQ + 32 = 10PQ
2 PQ = 32
PQ = 16 in

Thus, the requried measure of the PQ in the triangle PQT is 16 in.

Learn more about similar triangles here:

brainly.com/question/25882965

#SPJ1

The probability of rolling a triangle is 9 out of 15, or 60%.

Its essential vision is that an individual will nearly certainly happen.

Then the probability is given as,

P = (Favorable event) / (Total event)

As per the given data:

Total sides is a die = 15

triangles = 9

circles = 4

squares = 2

The probability of rolling a triangle is 9 out of 15, or:

For probability in % = (Favorable outcomes/Total outcomes) × 100

= (9/15) × 100

= 60%

Hence, The probability of rolling a triangle is 9 out of 15, or 60%.

More about the probability link is given below.

brainly.com/question/795909

#SPJ9

The interpretation of the 1001 measurements in the third set of data vary due to reasons are as follow,

Measurement error, Random variation and Sampling error.

Measurement error: The measurand being measured may have inherent variability, but measurement error can also contribute to variation in the data set.

Random variation: Even if the same measurand is being measured under the same conditions, there may be random fluctuations in the system or the environment that can cause variation in the data.

Sampling error: If the 11 measurements were not taken at random from the population of interest, then the variation could be due to sampling error.

For the 1001 measurements in the second and third data sets, some possible explanations for the variation could be measurement error, systematic variation, changes in the measurand and Sampling error.

Thus, variation in data can have many different causes, and it is important to carefully consider the context and specific factors that may be contributing to the variation when interpreting the results.

Learn more about the Measurement:

brainly.com/question/28109798

#SPJ4

Based on the given information, the cost of a pound of pistachios and a pound of cashews is $7.875 and $5.50, respectively.

To find the cost of a pound of pistachios and the cost of a pound of cashews, we can use a system of equations.

Let's let P represent the cost of a pound of pistachios and C represent the cost of a pound of cashews.

Then we can write two equations based on the information given:

4P + 1C = 37

3P + 3C = 48

Now we can use the elimination method to solve for one of the variables.

Let's multiply the first equation by -3 to eliminate the P variable:

-12P - 3C = -111

3P + 3C = 48

Adding these two equations together gives us:

-8P + 0C = -63

Simplifying gives us:

P = 63/8

This means that the cost for a pound of pistachios is $63/8 or $7.875.

Substitute the value of P to any of the two equations so we can have the value of C.

4(63/8) + 1C = 37

C = 11/2 = 5.5

Therefore, the cost of a pound of pistachios is $7.875 while the cost of a pound of cashews is $5.50.

Learn more about system of equation here: https://brainly.com/question/25976025.

#SPJ11

sin(30°) = ½

Sin(30°) have the value of √1/2 which gives ½

    The angles of a triangle equal 180 degrees when added together. We will use this logic to solve all three for x. We will use inverse operations and combine like terms to solve.

[30] Answer: x = 36

    Step-by-step explanation:

2x + 2x + x = 180

5x = 180

x = 36

[31] Answer: x = 9

    Step-by-step explanation:

* the little box represents 90 degrees

7x + 3x + 90 = 180

10x = 90

x = 9

[32] Answer: x = 45

    Step-by-step explanation:

2x + x + x = 180

4x = 180

x = 45

Step-by-step explanation:

when 2 shapes are similar, then that means (among few other things) that both have the same angles at their vertexes.

by looking at the relative sizes of the sides, we can map which vertex of one correlates to which vertex (and angle) in the other.

D -> X

C -> Y

G -> U

F -> V

E -> W

so, the angle W = angle E = 136°.

Answer:

Step-by-step explanation:

Answer:Price of the table yesterday is x.

Price of the table today is $513.

$513 is 76% of yesterday's price x. 76% can be also written down as 76 divided by 100 (percentage) or 76/100 = 0.76.

Formula we can set up now is: x= 513 / 0.76 (To get the price of yersterday's table we need to divide the price of today's table with percentage in decimal form).

x= 675

The price of yesterday's table was $675 since 76% of that price (675 times 0.76) equals 513 dollars.

Step-by-step explanation:

Step-by-step explanation:

We can solve for x in terms of y from the equation 3x - y = 12 as follows:

3x - y = 12

3x = y + 12

x = (y + 12)/3

Similarly, we can solve for y in terms of x:

3x - y = 12

-y = -3x + 12

y = 3x - 12

Now, we can substitute these expressions for x and y into the expression 8x/2y to get:

8x/2y = 4x/y

Substituting (y + 12)/3 for x, we get:

4x/y = 4((y + 12)/3)/y = 4(y + 12)/3y

Simplifying the numerator, we get:

4(y + 12) = 4y + 48

Substituting 3x - 12 for y, we get:

4y + 48 = 4(3x - 12) + 48 = 12x

Therefore, 8x/2y = 4x/y = 12x/4y = 12x/(3x - 12)

We cannot simplify this expression further without additional information. Therefore, the answer is (D) The value cannot be determined from the information given.

Step-by-step explanation:

remember, sine is the up/down leg, cosine is the left/right leg.

the Hypotenuse is the radius of the circle around the trigonometric triangle.

so,

sin(R) = 5/13

cos(R) = 12/13

tan(R) = sin(R)/cos(R) = 5/13 / 12/13 = (5×13)/(13×12) =

= 5/12

an = 2*an-1 + an-2 is the sequence's recursive rule, and the seventh term is 268.

A formula that explains how to move from one word in a sequence to the next is known as a recursive rule for a sequence.

The variable typically serves as a symbol for the concept of a number.

In other words, takes on the values 1, 2, 3, etc. for the first, second, third, etc. terms.

A recursive sequence is one in which terms are defined by reference to one or more previously defined terms.

The recursive formula an+1=an+d can be used to find the (n+1)th term of an arithmetic series if you know the nth term and the common difference, d.

So, we know that:
2 = 2 * 1 + 0

3 = 2 * 1 + 1

8 = 2 * 3 + 2

19 = 2 * 8 + 3

46 = 2 * 19 + 8

The sequence's nth term is as follows after the preceding sequence:

a7 = 2*an-1 + a7 - 2

For, a7:
a7 = 2*a7-1+a7-2

a7 = 2*a6+a5

a7 = 2*a6+46

a6 = 2*a5+a4

a7 = 2*(2*46+19)+46

a7 = 268

Therefore, an = 2*an-1 + an-2 is the sequence's recursive rule, and the seventh term is 268.

Know more about the recursive rule here:

https://brainly.com/question/29508048

#SPJ1

The maximum number of days she can drive the car is approximately 4 days.

A rental car company charges $61.79 per day to rent a car and $0.13 for every mile driven.

She plans to drive 50 miles. She has at most $230 to spend.

Therefore, the maximum number of days that Tallulah can rent the car while staying within her budget can be computed as follows:

Using equations,

y = 0.13a + 61.79b

where

Therefore, she has a budget of 230 dollars and she wants to ride for 50 miles.

230 = 0.13(50) + 61.79b

230 - 6.5 = 61.79b

223.5 = 61.79b

b = 223.5  / 61.79

b = 3.61709014404

Therefore,

b = 4 days

Hence, she can ride maximum of 4 days.

learn more on equation here: https://brainly.com/question/26096160

#SPJ1

By answering the above question, we may state that Hence, [tex]xy{(-4)}[/tex]is x exponents divided by y raised to the power of 4.

The mathematical process of exponentiation, frequently referred to as "b raised to the nth power," is symbolised by the symbol bn and includes two numbers: a base number, b, and an exponent, or power, n. Exponents demonstrate the number of times that a number has been multiplied by itself. For example, 2-3 (written as 23) means: 2 x 2 x 2 = 8. 2 + 3 does not equal 6, nor does 23. Remember that an integer whose power is one is equal to itself. Exponents can be used as a way to express large numbers as powers. Therefore, the exponent is the measurement that shows how many times a number has been multiplied by itself. For instance, multiplying 6 by 4 results in the values 6 x 6 x 6.  .

Considering that the phrase is:

[tex]xy^{-4}[/tex]

We may simplify the case when x and y both have positive exponents as follows:

[tex]xy^{(-4)} = x / y^4[/tex]

This is due to the negative exponents rule, which claims that y(-n) = 1/yn, which indicates that [tex]y(-n) = 1/yn.[/tex]

Hence, [tex]xy{(-4)}[/tex]is x divided by y raised to the power of 4.

To know more about exponents visit:

https://brainly.com/question/3987569

#SPJ1

a) The exponential growth equation is y = ( 1.2 )ˣ

b) The exponential decay equation is y = ( 0.71 )ˣ

The exponential growth or decay formula is given by

x ( t ) = x₀ × ( 1 + r )ⁿ

x ( t ) is the value at time t

x₀ is the initial value at time t = 0.

r is the growth rate when r>0 or decay rate when r<0, in percent

t is the time in discrete intervals and selected time units

Given data ,

Let the exponential growth equation be represented as A

Now , the value of A is

y = ( 1.2 )ˣ

where the growth rate is r = 20 %

Let the exponential decay equation be represented as B

Now , the value of B is

y = ( 0.71 )ˣ

where the decay rate is r = 29 %

The graph A represents an exponential decay graph and the graph B represents an exponential growth graph

Hence , the exponential equations are solved

To learn more about exponential growth factor click :

https://brainly.com/question/13674608

#SPJ1

Answer:

To solve the inequality:

-10 - 66h ≥ -3

We can begin by isolating the variable h on one side of the inequality. First, we can add 10 to both sides:

-10 + 10 - 66h ≥ -3 + 10

Simplifying, we get:

-66h ≥ 7

Next, we can divide both sides by -66, remembering to reverse the inequality since we are dividing by a negative number:

h ≤ -7/66

Therefore, the solution to the inequality is h ≤ -7/66.

Step-by-step explanation:

The completely factored expression by pulling out the 15x^(7)+3x^(4)+21     is  3(5x^(7)+x^(4)+7).

A factored expression is an algebraic expression that has been broken down into its prime factors. This is usually done to simplify the expression and make it easier to solve for a particular variable or to factor out a common factor from multiple terms.

To factor the given expression, we need to find the greatest common factor (GCF) of the terms and then divide each term by the GCF to get the simplified expression.

The GCF of 15x^(7), 3x^(4), and 21 is 3. So, we can factor out 3 from each term to get the simplified expression:

15x^(7)+3x^(4)+21 = 3(5x^(7)+x^(4)+7)

Therefore, the completely factored expression is 3(5x^(7)+x^(4)+7).

To know more about greatest common factor click on below link:

https://brainly.com/question/11221202#

#SPJ11