Solve the inequality. Write the solution set in interval notation.x2 - 2x - 15 < 0
A. (-3, 5)
B. (-?, -3)
C. (-?, -3) ? (5, ?)
D. (5, ?)
Answer: A
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Solve the problem.The weight of a person on or above the surface of the earth varies inversely as the square of the distance the person is from the center of the earth. If a person weighs 180 pounds on the surface of the earth and the radius of the earth is 3900 miles, what will the person weigh if he or she is 450 miles above the earth's surface? Round your answer to the nearest tenth of a pound.
A. 145.08 lb B. 144.18 lb C. 144.68 lb D. 146.08 lb
Decide which of the 5 properties of a commutative group (closure, identity, inverse, associative, commutative) hold for the given system.
A. Closure, identity, inverse, and commutative only B. Closure, identity, and inverse only C. Closure only D. All of them
An object is attached to a coiled spring. The object is pulled down (negative direction from the rest position) and then released. Write an equation for the distance of the object from its rest position after t seconds.amplitude = 9 cm; period = 3 seconds
A. d = -9 sin 
?t
B. d = -9 cos 
?t
C. d = -3 cos 
?t
D. d = -9 cos 
t
Use long division to determine whether the binomial is a factor of f(x).f(x) = x3 - 12x2 + 41x - 30; x - 6
A. No B. Yes