The answer is 6 because if the total length is 10 and part of the total length is 4, 10-4 is 6
Answer: The required lifetime value is 11.27.
Step-by-step explanation:
Since we have given that
Mean value = 11 hours
Standard deviation = 1 hour
The total lifetime of all batteries in a package exceeds that value for only 5% of all packages.
So, α = 0.95, z= 1.645
n = 9
So, the lifetime value would be

Hence, the required lifetime value is 11.27.
Answer:
b
Step-by-step explanation:
because b look like a great answer
I positive 15 and negative 15, in effect the absolute value function just removed negative signs
V=pi*(r )upper 2 * h
v= 3.14 (9*9 ) * 10
=847.8