Nonlinear Functions

SAT Math· difficulty 4/5

A bank pays 4% annual interest compounded annually. About how long until \1{,}000$ doubles?

  • A

    1010 years

  • B

    2525 years

  • C

    1818 years

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  • D

    1515 years

Explanation

Rule of 72: 72/4=1872/4 = 18 years.

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