Easy this answer is going to be 0.517 you can read and round
The answer is 1/5
I hope this helps.
Have a awesome day. :)
Answer:
80 minutes
Step-by-step explanation:
* means multiply
make 1 hour into 60 minutes
3 miles/60 minutes = 4 miles/x minutes
3x = 240
x = 80
Answer:
47.72% of the completion times is between 73.4 and 88.2 minutes
2.28% of the completion times is at most 58.6 minutes
Step-by-step explanation:
A reading test are normally distributed with a mean time of 73,4 minutes and a standard deviation of 7.4 minutes.

Standard deviation = 
A)Approximately what percent of the completion times is between 73.4 and 88.2 minutes i.e.P(73.4<x<88.2)
Formula : 
At x = 73.4

Z=0
Refer the z table for p value
p value = 0.5
At z = 88.2

Z=2
Refer the z table for p value
p value =0.9772
So,P(73.4<x<88.2)=0.9772-0.5=0.4772
So, 47.72% of the completion times is between 73.4 and 88.2 minutes
B)Approximately what percent of the completion times is at most 58.6 minutes i.e.
?


Z=-2
Refer the z table for p value
p value =0.0228
So,2.28% of the completion times is at most 58.6 minutes
If i am looking at your pictures correctly, the answer should be graph C.