# Math Help - Help with these problems please!

1. ## Help with these problems please!

Ok, the first problem (and I dont have the exact numbers but i just need to know how I would do it) is : If a bathtub drips water at a certain rate then how long will it take for the bath tub to be filled?

The second problem is: If you are given a certain amount of money for a building, and each square foot costs a certain amount. Determine how big a building you can build and then graph it.

Help?

2. If a bathtub drips water at a certain rate then how long will it take for the bath tub to be filled?

Name the certain rate of dripping m. Let b be the amount of water in the tub already if needed. x would be the amount of time and y would be the amount of water and add a constraint on y variable since only so much water can be held in the bath tub.

If you are given a certain amount of money for a building, and each square foot costs a certain amount. Determine how big a building you can build and then graph it.

y = mx

m = the price of each square root foot cost

Put a constraint on the y - value. If you 200 dollars than the constraing would be: $y\,\le\,200$

3. sorry i dont get it. especially the graph part. i dont know how im supposed to graoh it.

4. Originally Posted by MathHelp2
Ok, the first problem (and I dont have the exact numbers but i just need to know how I would do it) is : If a bathtub drips water at a certain rate then how long will it take for the bath tub to be filled?
Let the volume be V units of volume , let the rate at which the tap drips be v
units of volume per secons, then the time to fill is t = V/v

The second problem is: If you are given a certain amount of money for a building, and each square foot costs a certain amount. Determine how big a building you can build and then graph it.
Let the floor area of the building be A sq ft, let the cost per sq ft be £c,
and let the amount of money be £S.

Then A = S/c

RonL