If nylon is $15 per square yard, how much would the fabric cost to make a triangular sail with a base of 18 feet and a height of 30 feet?
A. $450
B. $2,025
C. $225
D. $8,100
E. $4,050
Answer: A
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Solve the problem.The Consumer Price Index provides a means of determining the purchasing power of the U.S. dollar from one year to the next. To use the Consumer Price Index to predict a price in a particular year, we can set up a proportion and compare it with a known price in another year as follows: 
= 
.In 1994 the Consumer Price Index was 148.2 and in 2000 it was 172.2. Find the amount that would be charged in 2000 for the use of the same amount of electricity that cost $180 in 1994. Give your answer to the nearest dollar.
A. $204 B. $155 C. $209 D. $200
Use the vertical-line test to determine whether the graph represents a function.
A. Yes B. No
Sketch the graph of the equation.y = -8x 
A. 
B. 
C. 
D. 
Solve the problem. Round to the nearest tenth when necessary.The roof of a building is in the shape of the hyperbola 
where x and y are in meters. Determine the distance, w, between the outside walls.A = 6 m
A. 6.6 m B. 3.3 m C. 11 m D. 7.8 m