Solve for the specified variable.
+ 
= c for b
A. b = 
B. b = 
C. b = 
- a
D. b = ac - 
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
The limiting value of 
is always the same as the limiting value of 
.
Answer the following statement true (T) or false (F)
Solve the problem.The lifetimes of light bulbs of a particular type are normally distributed with a mean of 360 hours and a standard deviation of 8 hours. What percentage of the bulbs have lifetimes that lie within 1 standard deviation to either side of the mean?
A. 95.44% B. 68.26% C. 84.13% D. 31.74%
Tell whether or not the relation is a function.{(-7,-7), (-7,-5), (-1,-6), (6,-1), (10,-7)}
A. Yes B. No