Find an equivalent equation in polar coordinates.x2 + y2 - 4x = 0
A. r = 4 cos ?
B. r cos2? = 4 sin ?
C. r = 4 sin ?
D. r sin2? = 4 cos ?
Answer: A
Mathematics
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Count the number of items asked for in the problem.Triangles (of any size)
A. 16 B. 15 C. 13 D. 19
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Express the statement as an equation involving the indicated variables.The volume V of a sphere is 
times ? times the cube of the radius r.
A. V = 
?r
B. V = 
?r3
C. V = 
?r2
D. V = 
? 
Mathematics
Find the volume of the solid generated by revolving the shaded region about the given axis.About the y-axis
A. 
?
B. 8?
C. 
?
D. 
?
Mathematics
Write the expression in word form.7 ? 7 ? 7
A. three times seven B. seven plus three C. seven squared D. seven cubed
Mathematics