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Nonlinear Equations in One Variable and Systems of Equations

SAT Math· difficulty 5/5

A ball is launched with h(t)=−16t2+vth(t) = -16t^2 + vt. It returns to the ground at t=5t = 5. What is vv?

  • A

    8080

    check_circle
  • B

    6060

  • C

    4040

  • D

    100100

Explanation

−16(5)2+5v=0-16(5)^2 + 5v = 0, −400+5v=0-400 + 5v = 0, v=80v = 80.

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