5. Harold rolls his $800 000 of savings into an annuity account. He wants the money to last for 15
years
(a) Given that Harold can withdraw $6284.75 each month, find the annual interest rate,
compounded monthly, of the account.
[3]
(b) How much longer would Harold's money last if he withdrew only $5000 each month?
[3]

y=mx+b

step-by-step explanation:

m is slope, b is y-intercept

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

8 2/3 is the answer

step-by-step explanation: just use a calculator

this answer is !