At the station, you fill the tank. You use an overhead fill that puts out 162 gallons per minute. How long will it take to fill the tank?

I'd guess that depends on the size of the tank.

If you need to add or subtract two rational expressions, how would you do it

figure the common denominator. Then, using that, add/subtract the values:

1/3 + 3/7

21 = 3*7, so you really have

(1*7)/(3*7) + (3*3)/(3*7) = (7+9)/21 = 16/21

a barrel can be filled in1 hr by 6 taps how long will it take to fill the barrel with 4 taps

To calculate the time it will take to fill the tank, we need to divide the total volume of the tank by the rate of filling.

First, we need to know the capacity of the tank. Let's say the tank has a capacity of C gallons.

Next, we need to determine the rate at which the tank is being filled. In this case, it is stated that the overhead fill puts out 162 gallons per minute.

Using the formula:

Time = Volume / Rate

In this case, the volume is C gallons, and the rate is 162 gallons per minute. So the formula becomes:

Time = C gallons / 162 gallons per minute

The units of gallons cancel out, leaving us with just minutes as the unit of time.

Therefore, to calculate the time required to fill the tank, you need to know the capacity of the tank (C) and divide it by the filling rate of 162 gallons per minute.