M! a store sells video tapes at 3.00$ for a set of two tapes .you have 20. dollars. you can split a set and buy one rape for the price of one. the unit rate is 1 tape = 1.50$ . you can buy 13 tapes for 19.5$. suppose there is a 7% tax. how many tapes can you buy now?

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2