The life expectancy of a star is a power function of its mass. It is observed that if the mass is doubled, the life expectancy is multiplied by 0.18. What is the value of the power k for this power function? Round your answer to two decimal places if necessary.
?
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Find the equation of the circle from the given information.The points (5, 3) and (5, -3) are the ends of a diameter.
A. (x - 3)2 + y2 = 25 B. (x - 5)2 + y2 = 9 C. x2 + (y - 3)2 = 25 D. (x - 5)2 + y2 = 3
Mathematics
Find the area of the region that lies inside the first curve and outside the second curve.
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Mathematics
Factor out the greatest common factor from the polynomial. Use a positive coefficient on the GCF.w - z
A. 0(w - z) B. 1(w - z) C. 1(w + z) D. w(1 - z)
Mathematics
Complete.38 t = 
kg
A. 0.038 B. 38,000 C. 3800 D. 0.38
Mathematics