What is the explicit formula for the geometric sequence with this recursive formula?

 A     an = -3 * (1/8) ^ (n-1)

Step-by-step explanation:

We know the first term a1 = -3

And the common ratio  r = 1/8 from the an = an-1 * 1/8

The explicit formula is

an = a1 r^ (n-1)

an = -3 * (1/8) ^ (n-1)

A

Step-by-step explanation:

a₁ = -3  ------>  first term

r ----> common ratio

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation:

the function makes a strait line horizontally with no x intercept but a y intercept at 9.