Suppose an investment of $8200 doubles in value every 7 years. how much is the investment worth after 28 years

After 28 years, it will be $131,200

Step-by-step explanation:

It is given that the investment doubles in value every 7 years.

So, after 7 years, it will be 8200 × 2 = 16,400

After 14 years, it will be 16,400 × 2 = 32,800

After 21 years, it will be 32,800 × 2 = 65,600

After 28 years, it will be 65,600 × 2 = 131,200

Hence, the investment is $131,200 worth after 28 years.