Linear Functions

SAT Math· difficulty 5/5

A pool fills at 8 gal/min. A leak drains 1.5 gal/min. Starting empty, time to reach 520 gal:

  • A

    100100 min

  • B

    8080 min

    check_circle
  • C

    7070 min

  • D

    104013\frac{1040}{13} min

Explanation

Net rate 6.56.5 gal/min; 520/6.5=80520/6.5 = 80 min.

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