An oil tank contains 220.2 gallons of oil......

Discussion in 'Calculator Requests' started by Rye, Nov 15, 2016.

  1. Rye

    Rye New Member

    An oil tank contains 220.2 gallons of oil. Whenever the amount of oil drops below 90 gallons, an alarm sounds. If 145.3 gallons are pumped into a delivery truck, how many gallons must be pumped back into the tank in order to shut off the alarm?

    I'm doing a remedial math course and I need help with a lot of questions..

  2. math_celebrity

    math_celebrity Administrator Staff Member

    Start with 220.2 gallons of oil. Add 145.3 more gallons
    220.2 + 145.3 = 365.3

    Now, figure out how much be pumped out to get down to 90. Call it x
    365.3 - x = 90

    Rearranging our equation, we have:
    x = 365.3 - 90
    x = 275.3

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