Simplify the expression.(-b)2
A. Exponent: 2, base: b
B. Exponent: -2, base: b
C. Exponent: -b, base: 2
D. Exponent: 2, base: -b
Answer: D
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The life expectancy E, in solar lifetimes, of certain stars depends on their mass M, in solar masses. The relationship is
.
As mass increases, life expectancy decreases. What can you say about the rate of decrease? A graph of E versus M can help you answer this question.
?
A. Life expectancy decreases at a decreasing rate. B. Life expectancy decreases at an increasing rate. C. Life expectancy reaches a point of inflection. D. None of the above.
Factor completely.21t3 - 91t2 - 70t
A. 7(t + 5)(3t - 2) B. t(3t + 2)(7t - 35) C. (t2 - 5)(21t + 14) D. 7t(t - 5)(3t + 2)
Solve the problem.An isosceles triangle has at least two sides of equal length. Determine whether the triangle with vertices 
and 
is isosceles.
A. Yes B. No
Find all solutions to the equation in the interval [0, 2?).sin 2x + cos 3x = 0
A. 0.3?, 0.7?, 1.1?, 1.9? B. 0.3?, 0.5?, 0.7?, 1.9? C. 0.3?, 0.5?, 0.7?, 1.1?, 1.5?, 1.9? D. 0.5?, 1.5?