# Precalculus

posted by
**Trevor**
.

.5=e^(-20t)

I am assuming this involves logs but we did't really learn logs. Anyone care to walk me through with a calculator. Have the Ti-83

posted by
**Trevor**
.

.5=e^(-20t)

I am assuming this involves logs but we did't really learn logs. Anyone care to walk me through with a calculator. Have the Ti-83