Answer:
The correct choice from given options is "$13.6 trillion".
Explanation:
Native Americans sold the island of Manhattan about 400 years ago for $24
n = number of years = 400
Amount spent on island = $24
Interest rate of invested amount = 7 percent per year
r = 7% = 0.07
cost today = ?
By using the formula;
Cost today= (1+r)ⁿ x Amount spent on island
= (1+0.07)⁴⁰⁰ x $24
= $13.6 trillion