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: 
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.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
Answer: C
Mathematics
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Find the center of mass of a thin plate covering the given region with the given density function.The triangular region cut from the first quadrant by the line y = -x + 7, with density ?(x) = x
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Mathematics
Find the phase shift of the function.y = -4 + 3 sin 
A. 
units to the left
B. 
units to the left
C. 
units to the right
D. 
units to the right
Mathematics
Solve the system by graphing. 3x + y = 812x + 4y = 32
A. (0, 8) B. (5, -7) C. Dependent D. Inconsistent
Mathematics
Evaluate the cylindrical coordinate integral.
A. 
B. 
C. 
D. 
Mathematics