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sertanlavr [38]
3 years ago
11

If you randomly select a beginner runner from the population have them run a 5k, what are the chances that they would finish it

between 25 and 27 minutes? That is, how many times, out of 100, would you randomly select someone that could run the 5k between 25 and 27 minutes? (Hint: use Appendix B.1 to answer this question. Start by calculating the z score for 25 and 27). Remember, you'll need to know the mean and standard deviation that you calculated for your population of runners. (Write a paragraph explaining, No Plagiarism!)
Time to complete 5k (in minutes):
21
21
22
22
23
23
23
24
24
24
24
24
25
25
25
26
26
27
27
Mathematics
1 answer:
Talja [164]3 years ago
8 0

Answer:

I dont know I’m just trynna get points sorry

Step-by-step explanation:

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3.14 is the square root of pie.
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she is incorrect because if she was given a 20% discount the amount she would have to pay is 38.4

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48 x .2 = 9.6

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Find f(-2).<br> A. 4<br> B. 8<br> C. 10<br> D. 20
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D. 20

Step-by-step explanation:

First, we need to plug in -2 to all the spots where x are. The new equation we have then is f(-2)= 2(-2)^2 - 3(-2) + 6. Then, we plug in the exponent to get 2(4) - 3(-2) + 6. We can then multiply to get 8 + 6 (since the three was negative as well) + 6, which equals 20.

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Eight less than a number is six more than twice the same number.<br> I need the number.
mariarad [96]
The answer is -14


Explanation:

x - 8 = 2x + 6

We move all term to the left

x - 8 - ( 2x + 6 ) = 0

We get rid of parentheses

x - 2x - 6 - 8 = 0

We add all the numbers together, and all the variables

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We move all terms containing x to the left, all other term to the right

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6 0
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Which number is NOT a solution to the inequality 14n − 46 ≤ 2(7 − 8n) ?
Daniel [21]

Answer:

(a)4

Step-by-step explanation:

First you would distribute the 2 within the parentheses and it becomes 14n-46 <= 14-16n. Then you would find the smallest coeficent and do the inverse operation so you would have to add 16n to 14n and get 30n. Your equation is now 30n-46<=14. Now you want to isolate the variable by doing the inverse operation of -46. You would then add 46 to positive 14 and get 60. Your eqaution now is 30n<=60. Your last step is to divide 30 on each side which leaves you with n<=2.

2 is less than or equal to 2

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4 is NOT less than or equal to 2 it is GREATER

Hopefully, that helps.

3 0
3 years ago
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