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) = 380 cos 2?x + 600, where x is time in years, measured from January 1. Find R'(x) for March 1st.
A. -380?
B. 0
C. -380?
D. -380?
Answer: C
Mathematics
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Find the first five terms of the arithmetic sequence.an = 3(4n - 1)
A. -3, 9, 21, 33, 45 B. 9, 21, 33, 45, 57 C. 3, 7, 11, 15, 19 D. 9, 18, 27, 36, 45
Mathematics
Provide an appropriate response.Let A be the event that it will be sunny this afternoon.Let B be the event that Francia will go shopping this afternoon. Given that P(A) = 0.8, P(B) = 0.9, and P(A ? B) = 0.2, are events A and B independent? How can you tell?
What will be an ideal response?
Mathematics
Evaluate the expression.644/3
A. 16,384 B. 256 C. 1024 D. 4096
Mathematics
Find the trigonometric form of the complex number shown below.
-4 + 4
i
A. 4
B. 2
C. 8
D. 4
E. 8
Mathematics