Can somebody walk me threw this math question?

9\times 1(3)/(5)\times (2)/(3)

Which recursive formula can be used to determine the total amount of money earned in any year based on the amount earned in the previous year? f(n+1)=f(n)+5

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Human body temperatures have a mean of 98.20° f and a standard deviation of 0.62°. sally's temperature can be described by z = 1.4. what is her temperature? round your answer to the nearest hundredth. 99.07°f 97.33°f 99.60°f 100.45°f