Complete the square. Then write the trinomial square in factored form.x2 + 8x
A. x2 + 8x + 16; 
2
B. x2 + 8x; 
2
C. x2 + 8x + 64; 
2
D. x2 + 8x + 16; 
2
Answer: A
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Find the derivative of y with respect to x.y = -csc-1 
A. 
B. 
C. 
D. 
Solve the problem.The area of a circle varies directly as the square of the radius of the circle. If a circle with a radius of 
has an area of 78.5 square inches, what is the area of a circle with a radius of 19 inches?
A. 119.32 in2 B. 1135.94 in2 C. 59.66 in2 D. 1133.54 in2
Find the vertex, the focus, and the directrix of the parabola.-2x2 + 12x - y - 22 = 0
A. V: (3, -4); F: 
; D: y = - 
B. V: 
; F: 
; D: x = - 
C. V: 
; F: (3, -12); D: x = -4
D. V: 
; F: (3, -6); D: x = -2
Write the number as indicated.In 2003, a large corporation earned approximately $5,400,000,000. Write the number in words.
A. Five billion, four hundred thousand dollars B. Five billion, four million dollars C. Five billion, four hundred million dollars D. Five million, four thousand dollars