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Class Made Review
This review sheet was made by the students in MAC 1140 Summer B 2009 Section 4630.
1. A rooﬁng contractor purchases a shingle delivery truck with a shingle elevator for $36,00.
The vehicle requires an average expenditure at $5.25 per hour for fuel and maintenance,
and the operator is paid $11.50 per hour.
(a) Write a linear equation giving the total cost
C
of operating this equipement for
t
hours.
(b) Assuming that customers are charged $27 per hour of machine use, write an equation
for the revenue
R
derived from
t
hours of use.
(c) Use the formula for proﬁt to write an equation for the proﬁt derived from
t
hours of
use.
2. Given three points, (0
,
2), (4
,
2) and (4
,
5), determine if they are the vertices of a right
triangle.
3. Given two points, (

4
,
10) and (4
,

5) ﬁnd the distance between them and the midpoint.
4. Find all points that are equidistant to the points (4
,

1) and (

2
,
3)
5. Write in standard form the equation of the circle with center (

2
,
6) and the circle goes
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 Fall '08
 WILLIAMSON
 Calculus, Algebra

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