Answer:

**Answer:**

65.94

**General Formulas and Concepts:**

__Pre-Algebra__

Order of Operations: **BPEMDAS**

- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction

- Left to Right

**Step-by-step explanation:**

__Step 1: Define__

*Identify*

3.14(a² + ab)

*a* = 3

*b* = 4

__Step 2: Evaluate__

- Substitute in variables: 3.14(3² + 3 · 4)
- (Parenthesis) Exponents: 3.14(9 + 3 · 4)
- (Parenthesis) Multiply: 3.14(9 + 12)
- (Parenthesis) Add: 3.14(21)
- Multiply: 65.94

Answer:

Hey there!

3.14(a^2 + ab)

= 3.14(3^2 + 3 *4)

3^2

= 3 * 3

= 9

3 * 4

= 12

3.14(9 + 12)

9 + 12

= 21

3.14(21)

= 65.94

Answer: 65.94

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

Quiz 2 : percent and percentage change the decimal 0.82 to a percent A. 0.8%B.82%C.90%D. None of these choices are correct

Circle O has a center at (-2, 10) and adiameter of 12 units. Which point lies on CircleO?A. (-6, -5)B. (-2, 4)C. (6,4)D. (8,8)

Which expression is equivalent to 4p^-4 10q -3? Assume

Hurry I am running out of time! I have 10 minutes.

Ls i cant figure it out quick please

Circle O has a center at (-2, 10) and adiameter of 12 units. Which point lies on CircleO?A. (-6, -5)B. (-2, 4)C. (6,4)D. (8,8)

Which expression is equivalent to 4p^-4 10q -3? Assume

Hurry I am running out of time! I have 10 minutes.

Ls i cant figure it out quick please

Simplifeid

**Answer:**

42m+10n+27

**Step-by-step explanation:**

Adding like terms

Answer: look at the picture

Step-by-step explanation: Hope this help :D

One-sample T

Test of mu=210 vs.>210

N Mean St. Dev SE Mean 95% lower bound T p

40 241.40 57.59 9.11 226.06 3.45 0.001

A H0 u>210 sec. H1 u < 210sec

B H0 u=210 sec. H1 u < 210sec

C H0 u<210 sec. H1 u> 210sec

D H0 u=210 sec. H1 u> 210sec

Identify the test statistic:

T =

Identify the P-Value

P-value=

Stat the final conclusion that addresses the original claim. Choose from below:

A. Reject H0. There is insufficient evidence to support the claim that the sample is from a population of songs with a mean length greater than 210 sec.

B. Fail to reject H0. There is insufficient evidence to support the claim that the sample is from a population of songs with a mean length great thatn 210 sec.

C. Reject H0. There is sufficient evidence to spport the claim that the sample is from a population of songs with a mean length greater than 210 sec.

D. Fail to reject H0. There is sufficient evidence to support the claim tha tthe sample is from a population of songs with a mean lenght greater than 210 sec.

What do the results suggest about the advice given in the manual?

A. The results do not suggest that the advice of writing a song that must be no longer than 210 seconds is not sound advice.

B The results suggest that the advice of writing a song that must be no longer than 210 seconds is not sound advice

C. The results suggest that 241.4 seconds is the best song lenght.

D. The results are inconclusive because the average length of a hit song is constantly changing.

**Answer:**

D H0 u=210 sec. H1 u> 210sec

C. Reject H0. There is sufficient evidence to spport the claim that the sample is from a population of songs with a mean length greater than 210 sec.

**Step-by-step explanation:**

**Data given and notation **

represent the sample mean

represent the sample standard deviation for the sample

sample size

represent the value that we want to test

represent the significance level for the hypothesis test.

t would represent the statistic (variable of interest)

represent the p value for the test (variable of interest)

**State the null and alternative hypotheses. **

We need to conduct a hypothesis in order to check if the mean is greater than 210 seconds, the system of hypothesis would be:

Null hypothesis:

Alternative hypothesis:

If we analyze the size for the sample is > 30 but we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:

(1)

**t-test:** "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

**Calculate the statistic**

We can replace in formula (1) the info given like this:

**P-value**

The first step is calculate the degrees of freedom, on this case:

Since is a one side test the p value would be:

**Conclusion **

If we compare the p value and the significance level given we see that so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the mean is significantly higher than 210 seconds.

C. Reject H0. There is sufficient evidence to spport the claim that the sample is from a population of songs with a mean length greater than 210 sec.

**Answer:**

40,075 kilometers

**Step-by-step explanation:**

The distance around the Earth at the Equator, its circumference, is 40,075 kilometers

**Answer:**

**Step-by-step explanation:**

Slope:

−1

y-intercept:

23

Heyy!:)

So

(X+1)2+(y-6)2=36

To Find x-intercept/zero substitute y=0

So it’s goin to be like this ;

(X+1)x2(0-6)x2=36

Solve the Equation for X

Answer;x=23 :)

So

(X+1)2+(y-6)2=36

To Find x-intercept/zero substitute y=0

So it’s goin to be like this ;

(X+1)x2(0-6)x2=36

Solve the Equation for X

Answer;x=23 :)

Each leaf on the tree diagram represents a possible combination. So we are to find the total number of combinations for the given scenario.

There are 5 ways to select the pant, 7 ways to select a shirt and 3 ways to select the shoes.

Total number of combinations will be the product of all these ways the dress items can be selected.

So, number of combination of outfits = 5 x 7 x 3 = 105

**Therefore, option B gives the correct answer**

There are 5 ways to select the pant, 7 ways to select a shirt and 3 ways to select the shoes.

Total number of combinations will be the product of all these ways the dress items can be selected.

So, number of combination of outfits = 5 x 7 x 3 = 105

To find this answer, just divide 360 by 5 to find out how many times his heart beats in one minute instead of 5. Doing this will give you a final answer of 72 bpm.