Describe marshall nirenberg's contribution to determining the role of rna in genetics. any little info ! : -)

In 1959, he demonstrated that mRNA is significant in protein synthesis. By contributing to the central dogma, he showed that just like DNA, mRNA can be used to determine the genetic code. His experiment involved a cell whose DNA was denatured but injected with mRNA and showed that protein synthesis proceeded.  

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.