It should be 3cm if I did it right
40 + 30s = 220
30 for each student (s) and the one charge of 40 would get the tutor 220 dollars.
Answer: 0.4758
Step-by-step explanation:
Given : Mean : 
Standard deviation : 
Also, the new population of pilots has normally distributed .
The formula to calculate the z-score :-

For x=130 lb .

For x=171lb.

The p-value =

Hence, the required probability : 0.4758
Answer: 31311620
Step-by-step explanation: Calculator
Answer:
13 months
Step-by-step explanation:
m=number of months
30(m)+50
30*13= 390
390+50=440