Find a polar equation for the circle.(x + 10)2 + y2 = 100
A. r cos ? = -20
B. r = -20 sin ?
C. r = 20 cos ?
D. r = -20 cos ?
Answer: D
Mathematics
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Which ofthe following is equivalent to:? Four times the sum of a number and 
is 42?
A.
?
B.
?
C.
?
D.
?
E.
?
Mathematics
Using complements (with respect to 1) of the single discounts, find the net cost equivalent for the following discount.25/25/25/5
A. 0.4 B. 0.6 C. 0.40078125 D. 0.59921875
Mathematics
For the given Cartesian equation, write an equivalent polar equation.x2 + 4y2 = 4
A. r2(4 cos2 ? + sin2 ?) = 4 B. 4 cos2 ? + sin2 ? = 4r C. cos2 ? + 4 sin2 ? = 4r D. r2(cos2 ? + 4 sin2 ?) = 4
Mathematics
Express the number in terms of i.-
A. -7
i
B. 3
i
C. -3
i
D. -21i
Mathematics