How to create a equivalent fracton with common denominator

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

A(t)=728(1+0.04)^t how much money did aditya originally invest

According to the 2008 u. s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.