An investment of \$2,500 doubles in value every 15 years. The function f defined by f(x) = 2, 500(2 ^ (rx)) represents the value of the investment , in dollars, years after the investment is made , where r is a constant. What is the value of r? R =

Step-by-step explanation:

Given that:

Investment amount = $2500

Time in which it gets doubled = 15 years

Amount after 15 years = $5000 (As per given statement as it gets doubled)

Value of investment in dollars after years if investment:

is a constant.

To find:

Value of .

Solution:

We are given that:

Putting all the values in the given equation:

Therefore, the value of is:

7

step-by-step explanation: