A study found that the average time a person spent exercising each week was 84 minutes, but there could be up to a 3% error in this number. Which of these could be the actual average time spent? A) 78.32 minutes B) 81.48 minutes C) 87.32 minutes D) 88.64 minutes

 C)87.32 minutes

Step-by-step explanation:

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

70 years.

step-by-step explanation: