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Nonlinear Functions

SAT Math· difficulty 4/5

A store discounts an item by 10% each week. Which expression gives the price after 4 weeks if the original price is PP?

  • A

    P(0.4)4P(0.4)^4

  • B

    P(1.1)4P(1.1)^4

  • C

    P(0.9)4P(0.9)^4

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  • D

    P−0.4PP - 0.4P

Explanation

Each week multiplies by 0.90.9; after 4 weeks: P(0.9)4P(0.9)^4.

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