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) = 92 cos 2?x + 600, where x is time in years, measured from January 1. Find R'(x) for August 1st.
A. 92?
B. 0
C. 92?
D. 92?
Answer: C
You might also like to view...
Find all angles in [0°, 360°) that satisfy the equation.cot ? = 1
A. {45°, 225°} B. {225°, 315°} C. {135°, 225°} D. {45°, 315°}
Write the statement in sentence form. Let p, q, and r represent the following statements.p: The puppy behaves well.q: His owners are happy.r: The puppy is trained.(r ? p) ? q
A. If the puppy is trained or the puppy behaves well, then his owners are happy. B. If the puppy is trained, then the puppy behaves well and his owners are happy. C. The puppy is trained and the puppy behaves well if his owners are happy. D. If the puppy is trained and the puppy behaves well, then his owners are happy.
Using the Superposition Theorem, find IR3 and VR4 .
E1 = 15.0 V
E2 = 35.0 V
R1 = 10 Kê
R2 = 10 Kê
R3 = 25 Kê
R4 = 15 Kê
Solve the problem.The table below shows the population of a certain city in various years. Use regression (or some other method) to find values for a and b so that 
models the data, where x represents the number of years since 1980 and f(x) represents the population of the city in hundreds of thousands. Round your answers to 5 significant digits.
A. a ? 2.1375, b ? 0.44316 B. a ? 2.6352, b ? 0.47558 C. a ? 1.8506, b ? 0.51209 D. a ? 1.7025, b ? 0.53750