Solve the problem.The product of 16 and the square root of some number is equal to that number decreased by 512. Find the number.
A. 768
B. 512
C. 2048
D. 1024
Answer: D
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Find all angles in degrees that satisfy the equation.tan x = -1
A. 
B. 
C. 
D. 
The letters x and y represent rectangular coordinates. Write the equation using polar coordinates (r, ?).x2 + 4y2 = 4
A. 4 cos2 ? + sin2 ? = 4r B. cos2 ? + 4 sin2 ? = 4r C. r2(cos2 ? + 4 sin2 ?) = 4 D. r2(4 cos2 ? + sin2 ?) = 4
Find the reciprocal, if it exists.
A. - 
B. 1
C. 
D. - 
Each day Larry needs at least 10 units of vitamin A, 12 units of vitamin B, and 20 units of vitamin C. Pill #1 contains 4 units of A and 3 of B. Pill #2 contains 1 unit of A, 2 of B, and 4 of C. Pill #3 contains 
of A, 1 of B, and 5 of C.Pill #1 costs 8 cents, pill #2 costs 14 cents, and pill #3 costs 
Larry wants to minimize cost. What is the constraint inequality for vitamin A?
A. 3P1 + 2P2 + P3 ? 12 B. 4P1 + P2 + 10P3 ? 10 C. 4P2 + 5P3 ? 20 D. 8P1 + 14P2 + 11P3 ? 10