68.01
A quotient is the answer to two numbers being divided.
Meaning 68.0052÷12 is 68.01
Answer:
He will earn $6 in interest in 9 months.
Step-by-step explanation:
This is a simple interest problem.
The simple interest formula is given by:

In which E is the amount of interest earned, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.
After t years, the total amount of money is:

Initial deposit of $400.
This means that 
2% annual interest
This means that 
How much interest will he earn in 9 months?
An year has 12 months, this means that 
This is E. So

He will earn $6 in interest in 9 months.
X=3 and y=x^2 intersect at (3,9), so your bounds are y=4 and y=9 and and . , so you use the disk method therefore you have to switch variables (even though x^2 is not invertible, because you only need the right side you can use y^(1/2)) so pi*integral( 3^2- (y^(1/2))^2 dy) making it pi*[9y-(1/2)y^2]|y=(4,9) , pi*[25/2]