SOLUTION: My teacher is making us do this project where we have to think of word problems for each of the functions. I cannot think of any for cubic or rational! I thought i did this one rig

Question 132683: My teacher is making us do this project where we have to think of word problems for each of the functions. I cannot think of any for cubic or rational! I thought i did this one right for rational but i'm not sure. please help me! my project is due thursday!!!
2. Jessica decides she wants to build a sandcastle in the shape of a dolphin. It takes Jessica 65 minutes to make this sandcastle and it takes Lucas, her boyfriend, 25 minutes to make the sandcastle alone. How long will it take them to make the sandcastle if they work together?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Linear: It cost 10 cents to set up Lucy's lemonade business. It costs
her 2 cents to make a glass of lemonade. What is her cost to make
50 glasses of lemonade?
Cost(x) = 10 + 2x
----------------------
Quadratic: The path of a baseball hit from 3' above the ground with
a velocity of 50 ft/sec is y = -16t^2+50t+3
How far from home plate will the ball hit the ground?
----------------------
Cubic: A box is x inches wide, 2x inches long, and 3x inches high.
what is the volume of the box
V = x*2x*3x = 6x^3
------------------------
Cheers,
stan H.

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