Sarathwent to anearby rice field and saw there were some other undesirable plants growing along with the rice plants. How do they affect the growth of the rice crop?

what's the question?

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.

b. read the phase at the intersection of any given temperature and pressure.