SOLUTION: Please, I need help on: Writing a piecewise function to model this situation: A garage will inflate a bicycle tires that are smaller than 20 inches in diameter for $1.50. They c

Click here to see ALL problems on Rational-functions

Question 353856: Please, I need help on: Writing a piecewise function to model this situation:
A garage will inflate a bicycle tires that are smaller than 20 inches in diameter for $1.50. They charge $2.25 to inflate bicycle tires that are 20 inches or larger. Let c(d) be the cost to inflate a bicycle tire that has a diameter of d inches.
I really don�t understand how to write a piecewise function but I tried to write a piecewise function for the above situation and it looks like this:
20<1.50d
20>=2.25d
I would appreciate the help if you were to help me write the correct piece wise function for that situation.
Thank you.

Found 2 solutions by josmiceli, stanbon:
Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website!
If you put on the vertical axis and
on the horizontal axis, the piecewise function is
for ,

and for ,

There are only 2 lines, and they are horizontal

Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website!
Write a piecewise function to model this situation:
A garage will inflate a bicycle tires that are smaller than 20 inches in diameter for $1.50.
One piece of the function is c(x) = 1.50 when 0< x <20
------------------------------
They charge $2.25 to inflate bicycle tires that are 20 inches or larger.
A second piece of the function is c(x) = 2.25 when x >= 20
=========================
Cheers,
Stan H