# Math/Finance Majors

• Programs

## Main Question or Discussion Point

Are there any Math/Finance Majors in here? I am currently a Math major, but I am also thinking about doing a double-major with Finance. I start this summer, so I still have time.

Hi, I'm new to this site and may be in the wrong place. If so, kindly direct me to the right place.
I wold like to solve the following question:
If the total interest earned on an investment at 8.2% compounded semiannually for 8.5 years was $1,175.98, what was the original investment? I would like to know what formula(s) to use. Thank you in advance. Makman Hi, I'm new to this site and may be in the wrong place. If so, kindly direct me to the right place. I wold like to solve the following question: If the total interest earned on an investment at 8.2% compounded semiannually for 8.5 years was$1,175.98, what was the original investment?
I would like to know what formula(s) to use.
Makman
You have to use the formula

P=A(1+r/m)^-(m*t)

A is you actual ammount