Multiple Choice Question

What is the formula for the future value of $$1$ invested for $t$ periods at a rate of $r$ per period?

Future value $=$$$1(1+r{)}^t$

Future value $=$$$\frac{1}{(1+r{)}^t}$

Future value $=$$$1(1+r)t$

Future value $=$$$1(1+r+t)$