Find the exact value of cos(2x).
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Use the law of cosines to find a true statement from the list below, if 
.
?
A. 
B. ?
C. ?
D. ?
E. ?
Solve the problem.A company had 34 employees last year and 23 employees this year. Find the percent decrease in the number of employees. Round to the nearest tenth of a percent, if necessary.
A. 47.8% B. 67.6% C. 52.2% D. 32.4%
Solve the problem.A carpenter is building a rectangular room with a fixed perimeter of 
What are the dimensions of the largest room that can be built? What is its area?
A. 20 ft by 180ft; 3600 ft2 B. 50 ft by 150 ft; 7500 ft2 C. 50 ft by 50 ft; 2500 ft2 D. 100 ft by 100 ft; 10,000 ft2
Solve the problem.Students at East Central High School earned $524 selling candles. They want to make $4820 for a club trip. What percent of their goal has been reached? Round to the nearest tenth of a percent, if necessary.
A. 92% B. 1.1% C. 9.2% D. 10.9%