81, 27, 9,

find the common ratio of the given sequence, and write an exponential function which represents the sequence. use n = 1, 2, 3,

a) 3; f(n) = 81^n-1

b) 3; f(n) = 81(3^)n-1

c) 1/3; f(n)=81(3)^n-1

d) 1/3; f(n)=81(1/3)^n-1

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

If the dimensions of a rectangular prism are 5 ft x 3.5 ft x 2 ſt, what is the surface area?

Fa bus driver leaves her first stop by 7: 00 a.m., her route will take less than 37 minutes. if she leaves after 7: 00 a.m., she estimates that the same route will take no less than 42 minutes. which inequality represents the time it takes to drive the route, r?