Compute r, the linear coefficient of correlation, for the given data.A study was conducted to compare the average time spent in the lab each week versus course grade for computer students. The results are recorded in the table below. Number of hours spent in labGrade (percent) 109611511662958789158116461051
A. -0.335
B. -0.284
C. 0.462
D. 0.017
Answer: A
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Write the expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the expression.cos2 60° - sin2 60°
A. - 
B. 
C. 
D. - 
Perform the indicated operation. Be sure to simplify your answer.- 
+ 
A. 
B. 
C. 
D. - 
Simplify the expression. Write with only positive exponents. Assume that variables represent positive real numbers.3-3 ? 35
A. 915 B. 32 C. 3-15 D. 92
Solve the problem.Factories A and B sent rice to stores 1 and 2. A sent 10 loads and B sent 24. Store 1 used 17 loads and store 2 used 17. It cost $200 to ship from A to 1, $350 from A to 2, $300 from B to 1, and $250 from B to 2. $8350 was spent. How many loads went where?
A. 9 from A to 1 1 from A to 2 8 from B to 1 4 from B to 2 B. 8 from A to 1 2 from A to 2 9 from B to 1 15 from B to 2 C. 10 from A to 1 0 from A to 2 7 from B to 1 17 from B to 2 D. 0 from A to 1 10 from A to 2 17 from B to 1 7 from B to 2