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34kurt
3 years ago
12

Stephanie is trying to figure out the sample size of an experiment. She knows the population SD is 41.5 and the SD of the sample

averages is 2.7. What is the sample size of the experiment?
a. 15.37


b. 0.00367718446


c. 236.24
Mathematics
1 answer:
Bond [772]3 years ago
6 0
B I smskksss snsjsjsjsjs wjqjwjqjwjjw xixxiidididid a hahaha dixixidjjdjjs w
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3x +15=75 what is the value of x​
kifflom [539]

Answer:

X=20

you subtract 15 from 75 to get 60 then divide 60 by 3 to get 20

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3 years ago
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Find AB, BC, and AC
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4 0
3 years ago
This is a 3 part question, PLEASE HELP ILL GIVE BRAINLY
kaheart [24]

Answer:

Angle of A = 90 degree-62 degree =  28 degree.

Step-by-step explanation:

tan (62) = opposite / adjacent = 10 / a ---> a = 10/tan (62) = 10/ 1.88 = 5.319

cos (62) = a/c --->c = a/cos (62) = 5.319 / 0.47  = 5.3 / 0.47  = 11.3

or another way.

sin (62) = 10 /c  ---> c = 10/ sin (62) = 10 / 0.88 = 11.3

So Angle of A = 28 degree.

a = 5. 3

c =  11.3.

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3 years ago
Simplify 8(a+2)+2(2+3a)
Alexxx [7]

Expand

8a + 16 + 4 + 6a

Collect like terms

(8a + 6a) + (16 + 4)

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<u>14a + 20</u>

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3 years ago
Medical researchers have determined that for exercise to be beneficial, a person’s desirable heart rate, r, in beats per minut
Scorpion4ik [409]

Answer:

R, in beats per minute, can be approximated by the formulas, where a represents the person's age.

where R= 143 - 0.65a for women.... (1)

and R= 165 - 0.75a for men,..... (2)

So by implementing these two equation we get a = 40

So the age will be 40 years old

 

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1 year ago
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