
Katie S. answered 06/15/21
Knowledgeable, Patient, and Encouraging Certified Math Teacher
Hi.
I would use the formula A=Pert
A= Amount in account after compounded continuously
P= Principal - initial amount of investment
r= rate - the percentage as a decimal
t=. time - years it is compounded continuously
A= what you need to find
P = 4200
r = 5% = .05
t=15
Plug in P, r and t into the above equation and you should have the answer. Btw, e is a number it’s approx 2.72 ish.
I hope this helps. Have a great day!
Mrs. S