Translate the statement into a mathematical expression.A salesperson drove 6 hours. How long will he have driven t hours later?
A. 6 - t
B. 6
C. 6t
D. 6 + t
Answer: D
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Solve the problem.A rotating beacon is located 15 ft from a wall. The distance from the beacon to the point on the wall where the beacon is aimed is given by a = 15
,where t is time measured in seconds since the beacon started rotating. Find a for 
Round your answer to the nearest hundredth.
A. 60.32 ft B. -17.12 ft C. 17.12 ft D. 38.72 ft
Completely factor the polynomial or state that the polynomial is prime.x4 + 4x2 - 21
A. (x2 + 3)(x2 + 7) B. prime C. (x2 + 3)(x2 + 1) D. (x2 - 3)(x2 + 7)
Solve the problem.Write a polynomial that represents the total area of the six sides of a cube if each side has length (n + 2).
A. 6(n2 + 4) B. 6(n2 + 4n + 4) C. 4n2 + 4n + 4 D. 6(n + 4)
Factor the difference of squares.x2 - 144
A. (x + 12)(x + 12) B. (x - 12)(x + 12) C. (x - 12)(x - 12) D. Cannot be factored