A manufacturer uses a tank to supply water to his machines while they are working. When the machines are on the tank loses 1.5 gallons of water an hour at the same time 1 gallon of water is pumped into the tank from a well. Write an equation that models the amount of water (w) in the tank for any hour (h) that the machines are on. The tank starts full with 150 gallons of water in it.

A) W = 1t + 150
B) W = -.5t + 150
C) W = 150t - 0.5
D) W = -1.5t + 150

Question

A manufacturer uses a tank to supply water to his machines while they are working. When the machines are on the tank loses 1.5 gallons of water an hour at the same time 1 gallon of water is pumped into the tank from a well. Write an equation that models the amount of water (w) in the tank for any hour (h) that the machines are on. The tank starts full with 150 gallons of water in it.

A) W = 1t + 150
B) W = -.5t + 150
C) W = 150t - 0.5
D) W = -1.5t + 150

anonymous · Answer

i do know that it loses half gallon an hour as its total. . .

ganeshie8 · Answer

thats a great start !

ganeshie8 · Answer

no wait, you're done. thats it !! just look at ur options

anonymous · Answer

wait so is it A.

ganeshie8 · Answer

i do know that it loses half gallon an hour


if time is represented using the letter "t",
then the water lost by anytime "t" is given by :   0.5t

ganeshie8 · Answer

Since the tank has 150 gallan to start with :

`150 - 0.5t` is the required expression for amount of water present in the tank after "t" hours

ganeshie8 · Answer

its B

anonymous · Answer

So its B . . . but why is it a negative?

anonymous · Answer

oh wait nevermind i got it. . . you had to subtract it from 150 nm thanks :)

ganeshie8 · Answer

Amount of water in the tank =   `150 - 0.5t`

ganeshie8 · Answer

Exactly !!