Find a polar equation for the circle.x2 + y2 - 8y = 0
A. r = 8 sin ?
B. r = -8 cos ?
C. r = -8 sin ?
D. r = -4 sin ?
Answer: A
Mathematics
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Perform the indicated operations, and write the answer in scientific notation.
A. 2 × 104 B. 2 × 106 C. 2 × 10-5 D. 2 × 107
Mathematics
Graph the linear inequality.y ? 3x
A. 
B. 
C. 
D. 
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Solve the problem.Crafty Bill's Cool Car Sales opened as a used car sales lot in 2006. The graph shows the number of cars sold as a function of time. What is the approximate number of cars sold in 2008? 
A. 400 cars B. 350 cars C. 500 cars D. 550 cars
Mathematics
Find the infinite sum accurate to 3 decimal places.
A. 0.143 B. 0.200 C. -0.571 D. 0.800
Mathematics