Simplify.
A. 
B. 
C. 
D. 
Answer: D
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Solve the problem.The grade resistance F of a car traveling up or down a hill is modeled by the equation F = W sin ?, where W is the weight of the car and ? is the angle of the hill's grade (? > 0 for uphill travel, ? < 0 for downhill travel). A 2025-lb car has just rolled off a sheer vertical cliff (? = -90°). What is the car's grade resistance?
A. 0 lb B. -2025 lb C. 2025 lb D. undefined
Find the area of the shaded region.
A. 197.5 m2 B. 196 m2 C. 172 m2 D. Not enough information given
Solve the inequality by the test-point method. Write the solution in interval notation.(x + 5)(x + 4)(x - 1) > 0
A. (-?, -5) ? (-4, 1) B. (-5, -4) ? (1, ?) C. (-?, -4) D. (1, ?)
Factor the perfect square.x4 + 10x2 + 25
A. (x2 + 5)2 B. (x + 5)2 C. (x2 - 5)2 D. (x + 5)(x - 5)