Problem 1
Whi=
ch
pre-tax sales totals are charged exactly 25 cents sales tax.
(Assume a tax rate of 8% and that sales tax is rounded to the nearest cent.=
)
[Problem
submitted by Don Hentschel, LACC Professor of
Mathematics.]
Solution for Prob=
lem 1:
=
Let=
x =3D the
pre-tax sales total. The minimum value that would round to 25 cents is 24.5
cents; the maximum is 25.5 cents. Therefore we must solve two inequalities.=
Min=
imum:
![](3D"2007prob1_files/image002.gif")
The=
refore,
the minimum value is $3.07
Max=
imum
![](3D"2007prob1_files/image004.gif")
The=
refore
the maximum value is $3.18
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