Which of these describes how heat transferred by convection?
a. warm air rises and takes heat with it; eventually it cools and sinks
b. air molecules touch the warm ground, heating it up
c. land and ocean absorb and re-emit heat from the sun
d. sunlight travels through space without the aid of fluids or solids

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.

it is either c or d and i know for sure it is not a or b