Use a graphing calculator to approximate the zeros in the indicated interval. Round answers to two decimal places, if necessary.f(x) = x4 cos x; [-8, 8]
A. -4.71, -1.57, 0, 1.57, 4.71
B. -7.85, -4.71, -1.57, 0, 1.57, 4.71, 7.85
C. 0, 3.14, -6.28, -3.14, 6.28
Answer: B
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Give an appropriate answer.If f(x, y, z) = (x4 + y2 + z)2 find fyy(x, y, z).
A. 4x4 + 12y2 + 4z B. 8y2(x4 + y2 + z) C. 4y2(x4 + y2 + z) D. 2x4 + 6y2 + 2z
Determine whether there is sufficient information for solving a triangle, with the given combination of angles and sides, by the law of sines.b, B, and c
A. Yes B. No
Find the volume of the solid.
Sphere with diameter of 4.2 unitsUse 3.14 as the approximate value for ?. Round results to the nearest hundredth if necessary.
A. 9.23 cu. units B. 232.64 cu. units C. 38.77 cu. units D. 55.39 cu. units
Solve the problem.Suppose that the function y = f(x) is increasing on the interval (2, 9). Over what interval is the graph of 
increasing?
A. (8, 15) B. (12 , 54) C. (-4, 3) D. (2, 9)