Both plant cells and animal cells contain mitochondrion and yet there were not visible in the cells you viewed in this lab. does this mean that these organelles are not found in cheek and onion cells? why or why not?

They are.

Explanation:

The mitochondria and some other organelles in the cell are easily visible upon staining before viewing under the microscope.

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.