What is the purpose of using fraction strips and a 1 strip

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Tyler enjoys the fish so much that after his birthday his family decides to take him to a famous aquarium a tank at the aquarium is similar to his tank with the scale factor of 8 how many times greater is the volume of the tank at the aquarium than the volume of tyler tank

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c