Factor as completely as possible. If unfactorable, indicate that the polynomial is prime.x4 + 15x2 - 16
A. (x2 - 1)(x2 + 16)
B. (x + 1)(x - 1)(x2 + 16)
C. (x - 1)2(x2 + 16)
D. (x + 1)(x - 1)(x + 4)(x - 4)
Answer: B
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Convert the units using unit fractions.12,000 lb = 
tons
A. 6
B. 7
C. 5
D. 6
Decide whether the given sequence is finite or infinite.3, 4, 5, 6, . . .
A. Finite B. Infinite
Solve the problem.From a distance of 50 feet from the base of a building, the angle of elevation to the top of the building is 63°. Estimate the height of the building to the nearest foot.
A. 45 feet B. 98 feet C. 25 feet D. 23 feet
Find a rectangular equation for the plane curve defined by the parametric equations.x = 2t - 1, y = t2 + 4; -4 ? t ? 4
A. y = - 
x + 30; for x in -6 ? x ? 4
B. y = 
x2 + 1; for x in -6 ? x ? 4
C. y = x2 + 1; for x in -2 ? x ? 2
D. y = 
x2 + 
x + 
; for x in -9 ? x ? 7