Modeling with composite functions?

The class wants to raise a total of $750.if they receive a profit of $1.25 from each candybar sold, how many bars must they sell to reachtheir goal

Which expression is equivalent to 16 in exponential form? a) 4 × 4 b) 8 × 2 c) 23 d) 24

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi