Find the derivative of the function at the point p in the direction of a.f(x, y) = e-8y cos x, p = (-2?, 0), a = 
i - j
A. 4
B. 
C. - 4
D. - 
Answer: A
Mathematics
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Use the range rule of thumb to approximate the standard deviation.The following is a set of data showing the water temperature in a heated tub at different time intervals. Round results to the nearest tenth.113.7 115.6 116.3 115.6 115.6 115.5 112.5 113.9
A. -55.7 B. 1.3 C. 1.0 D. 0.8
Mathematics
Solve the problem.Estimate the maximum height reached by a baseball during its flight if it is thrown with a velocity of 103 feet per second at an angle of 67° relative to level ground.
A. 845 ft B. 60 ft C. 140 ft D. 25 ft
Mathematics
Find the probability of the event.If two 6-sided dice are rolled, what is the probability that the sum is 3?
A. 
B. 
C. 
D. 2
Mathematics
Subtract.-15 - (-6)
A. 21 B. -21 C. 9 D. -9
Mathematics