Solve.
= 
A. 7
B. 8
C. 64
D. 60
Answer: A
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Perform the indicated operations. Assume that all variables represent nonnegative real numbers.7
- 5x
A. 7
- 5x
B. 2x
C. 2x
D. 12
Find a polar equation for the circle.x2 + (y - 9)2 = 81
A. r = 18 cos ? B. r = -18 sin ? C. r cos ? = -18 D. r = 18 sin ?
Solve the equation.-9t = 27
A. -18 B. -3 C. 9 D. 27
Plot and interpret the appropriate scatter diagram.The table gives the times spent watching TV and the grades of several students. 
Effect of Watching TV on Grades 
A. Effect of Watching TV on Grades
More hours spent watching TV may
reduce grades.
B. Effect of Watching TV on Grades
More hours spent watching TV may
reduce grades.
C. Effect of Watching TV on Grades
More hours spent watching TV may
increase grades.
D. Effect of Watching TV on Grades
More hours spent watching TV may
increase grades.