The letters x and y represent rectangular coordinates. Write the equation using polar coordinates (r, ?).x2 = 4y
A. r cos2 ? = 4 sin ?
B. 4 sin2 ? = r cos ?
C. r sin2 ? = 4 cos ?
D. 4 cos2 ? = r sin ?
Answer: A
Mathematics
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Find the slope of the polar curve at the indicated point.r = 1 - sin ?, ? = 0
A. 
B. -1
C. 2
D. 
Mathematics
Perform the indicated operation.6737 - 1355
A. 5382 B. 5312 C. 6382 D. 5372
Mathematics
Does the system have one solution, no solution, or an infinite number of solutions?x + 2y = 0y = - 
x
A. One B. No Solution C. Infinite number
Mathematics
Write a word name for the number in the sentence.The sales tax rate in Boone County is 4.6 percent.
A. Forty-six thousandths B. Four and 6 hundredths C. Four and six tenths D. Forty-six hundredths
Mathematics