2. Shawn has to pay 5% sales tax on his $500 purchase. How much tax will Shawn pay?
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The discontinuity are the point wherein the function is not defined.
The zeros are the points wherein f(x)=0.
Computing the discontinuity points:
Set
then the discontinuity point is at 
.
Comptine the zeroes:
Set
Compute the discriminant:
Then with quadratic formula we get the solutions:
The two zeros are
The zeros are the points wherein f(x)=0.
Computing the discontinuity points:
Set
Comptine the zeroes:
Set
Compute the discriminant:
Then with quadratic formula we get the solutions:
The two zeros are