4. Paul and Frank are on the same bike path 39.15 miles apart. The are going to ride their bikes toward each other until they meet. Frank starts pedaling 13 hours before Paul.
Paul rides 1.8 miles per hour faster than Frank. If they meet three hours after Paul
starts riding, find the speed of each biker.

step-by-step explanation:

107 units

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

there are infinitely many solutions.