Use the drop-down menus to answer the questions. Which fossil is the oldest? ammonite, crinoid, trilobite

Crinoids

Explanation:

Crinoids are 300 million years old, Ammonite is only 200 million, and Trilobite is just 250 million years old

9.9 years

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.

maritime tropical may be your answer.