Solve the problem.The median weekly incomes of full-time female workers for various age groups are listed in the table below. 
(Source: Bureau of Labor Statistics, 4th quarter of 1999 data)Let W represent the median weekly income (in dollars) of women at age a years. Here is the quadratic regression equation for W: W = -0.30a2 + 27.61a - 97.01Use this model to estimate the median weekly income of women at age 20.
A. $315
B. $335
C. $328
D. $320
Answer: B
Mathematics
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Use logarithmic differentiation to find the derivative of y with respect to the independent variable.y = x7 sin x
A. 7 sin x ln x
B. 7 cos x ln x + 
C. x sin x
D. 7 x7 sin x
Mathematics
Solve the problem.Find the center of mass of the hemisphere of constant density bounded 
and the 
A. 
= 0, 
= 0, 
= 
B. 
= 0, 
= 0, 
= 
C. 
= 0, 
= 0, 
= 1
D. 
= 0, 
= 0, 
= 
Mathematics
Use the root test to determine if the series converges or diverges.
A. Converges B. Diverges
Mathematics
Provide an appropriate response.In right triangle ABC with right angle C, find the indicated part. Round to four significant digits. Find a if B = 34° and b = 12 in.
Fill in the blank(s) with the appropriate word(s).
Mathematics