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.
Answer: A
Mathematics
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Evaluate the exponential expression. Write the answer as an improper fraction where appropriate.-(0.4)3
A. -1.2 B. 0.133 C. -0.064 D. 0.064
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Find the domain of the composite function (g ? f)(x). Write the domain in interval notation.f(x) = -5x + 3, g(x) = 3x + 2
A. (-?, 0] B. [0, ?) C. (-?, 3) D. (-?, ?)
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Divide.
A. x2 + 2
B. x2 + 2x + 
C. x2 + 2 + 1
D. x2 + 2 + 
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Determine whether the equation balances when the proposed solution is tested.
= 
+ w Solution is 9
A. Balances B. Does not balance
Mathematics