Mona has an account with a balance of $738. she originally opened the account with a $500 deposit and a simple interest rate of 5.6%. if there were no deposits or withdrawals, how long ago was the account opened?

one that is bigger than 3 1/2

answer: #1 ads up by 8 and i don't know #2

hello from mrbilldoesmath!

answer:   x^2 + y^2 = 1024

discussion:

the equation of a circle with center (h,k) and radius "r" is

(x-h)^2 + (y-k)^2 = r^2.

in our case

(x-0)^2 + (y-0) ^2 = 32^2 = 1024

you,

mrb