Find the indicated derivative.Find y(4) if y = 6 sin x.
A. y(4) = - 6 sin x
B. y(4) = - 6 cos x
C. y(4) = 6 sin x
D. y(4) = 6 cos x
Answer: C
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Use a calculator to find the function value to four decimal places.sin(1.57)
A. 1 B. 0.2722 C. 0.9622 D. 0
Solve the problem.Water is steadily pumped out of a flooded basement. Let v be the volume of water (in thousands of gallons) that remains in the basement t hours after water begins to be pumped. A linear model is shown. After how many hours of pumping will all the water be pumped out of the basement?
A. 4 hours B. 5.5 hours C. 4.5 hours D. 5 hours
Solve the problem.A contractor finds that it takes Sam Tockett 9 hours to construct a wall of a certain size. It takes Jim Lowell 7 hours to construct the same wall. How long would it take if they worked together?
A. 3
hours
B. 
of an hour
C. 1 hour
D. 16 hours
Perform the indicated operation and simplify. Write the answer in the form a + bi.(3 + 5i) - (-2 + i)
A. 5 + 4i B. 5 - 4i C. -5 - 4i D. 1 + 6i