Nonlinear Functions

SAT Math· difficulty 4/5

A savings account triples every 20 years. Which model gives the balance at year tt starting with \1000$?

  • A

    1000+3t1000 + 3t

  • B

    10003t1000 \cdot 3^{t}

  • C

    100020t/31000 \cdot 20^{t/3}

  • D

    10003t/201000 \cdot 3^{t/20}

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Explanation

Triples in 20 years: f(t)=10003t/20f(t) = 1000 \cdot 3^{t/20}.

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