Solve.Find two numbers whose product is 18 and the sum of whose reciprocals is 
A. 324 and 
B. 162 and 
C. 36 and 
D. 2 and 9
Answer: D
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Find the magnitude and direction angle for the following vector. Give the direction angle as an angle in [0°, 360°) rounded to the nearest tenth.
A. 
, 250.3°
B. 
, 109.7°
C. 
, 199.7°
D. 
, 160.3°
Find the axis of symmetry of the parabola defined by the given quadratic function.f(x) = x2 + 7
A. x = -7 B. y = 7 C. x = 0 D. x = 7
Divide. Assume all variables are nonzero.(16x3 + 24x2 + 12x) ÷ (4x)
A. 27 B. 4x2 + 6x + 3 C. 4x2 + 9x D. 4x4 + 6x3 + 3x2
Solve the problem.The formula D = 8e-0.6hcan be used to find the number of milligrams D of a certain drug that is in a patient's bloodstream h hours after the drug has been administered. The drug is to be administered again when the amount in the bloodstream reaches 4 milligrams. What is the time between injections?
Fill in the blank(s) with the appropriate word(s).