Find the common ratio of the give 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

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

Simplify each expression. use positive exponents. show work . (x –2 y –4 x 3 ) –2

Emmanuel added 888 links per minute to his chain mail. allesia started 202020 minutes after emmanuel and added 131313 links per minute to her chain mail. how long had emmanuel worked when allesia caught up to him, and how many links had he added?