If element x has 32 protons, how many electrons does it have?

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Element X has 32 electrons.

Explanation:

It is because the number of protons is equal to the atomic number of an element while the number of electrons is equal to the number of protons. Thus element X which has 32 protons do have 32 electrons.

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.