Solve.A $210 lamp is on sale at 10% off. Find the sale price.
A. $21.00
B. $2.10
C. $189.00
D. $2079.00
Answer: C
Mathematics
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Perform the multiplication and simplify.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Mathematics
Calculate the circulation of the field F around the closed curve C.F = - 
x2yi - 
xy2j; curve C is r(t) = 4 cos ti + 4 sin tj, 0 ? t ? 2?
A. - 1 B. - 2 C. - 4 D. 0
Mathematics
Perform the indicated operation. Assume that all variables represent nonnegative real numbers.11
- 3
A. 2
B. 11
- 3
C. 8
D. -2
Mathematics
Find the focus and the directrix of the parabola.y = - 
x2 - 
x - 
A. (-5, -3); y = -5
B. (-5, 0); y = 2
C. (-5, 2); y = 0
D. 
; y = 
Mathematics