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17 May, 01:15

A savings account grows by 3% each year. Sofia places $500 in the account at the beginning of the year. (a) How much does Sofia have at the end of the year once her $500 has been increased by 3%?

(b) How much does Sofia have at the end of the second year based on increasing your answer from part (a) by 3%?

(c) Did the amount of money in Sofia's account grow faster the first year or the second year? Explain how you arrived at your answer.

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  1. 17 May, 01:23
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    a) $515

    b) $530.45

    c) The amount grew faster in the second year. Because after each year, the amount she has increase, and then the 3% will be applied over a higher amount than before, generating more profit than the previous year.

    Step-by-step explanation:

    a)

    After one year, the amount increased is 3% of the inicial value, so it is 0.03 * 500 = $15

    So Sofia has 500 + 15 = $515 at the end of the year.

    b)

    After the second year, the amount will increase by 3%, but now the amount is 515, so we have 0.03 * 515 = $15.45

    So Sofia has 515 + 15.45 = 530.45 at the end of the second year.

    c)

    The amount grew faster in the second year. Because after each year, the amount she has increase, and then the 3% will be applied over a higher amount than before, generating more profit than the previous year.
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