In Mathworld, they define Simple Interest as:(adsbygoogle = window.adsbygoogle || []).push({});

a(t) = a(0)(1 + rt)

wherea(t)is the sum of principal and interest at timetfor a constant interest rater.

I just want to know why that 0 is in there. Anything divided by 0 will be 0, thus a(t) = 0?

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Interest a(t) = a(0)(1 + rt)

**Physics Forums - The Fusion of Science and Community**