Solve the problem.The revenue received from the sale of electric heaters is seasonal, with maximum revenue in the winter. Let the revenue received from the sale of heaters be approximated by R(x) = 216 cos 2?x + 600, where x is time in years, measured from January 1. Find R'(x) for August 1st.
A. 0
B. 216?
C. 216?
D. 216?
Answer: B
Mathematics
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Simplify the rational expression. If the expression is already in simplest form, state this as your answer.
A. 1 B. -1 C. simplest form D. y + 1
Mathematics
Find y '.y = 
A. - 
- 2x
B. - 
+ 2x
C. - 
- 2x
D. 
+ 2x
Mathematics
Solve the problem.The image of a figure under the translation that takes P to P' is shown. Find the original figure. Note again, the given figure is the image after translation.
A. 
B. 
C. 
D. 
Mathematics
Write the logarithmic equation as an exponential equation.ln 
= -1
A. e1/e = -1
B. e-1 = 
C. e-1 = -1
D. e-1 = -e
Mathematics