Find all real numbers that satisfy the equation.cos (?/2) = 

A.
B.
C.
D.

Answer: C

Mathematics

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Let f(x, y) = x + 3xy - 7x - 8. Find f(2h, 3k).

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Find the moment of inertia (in g?cm2) and the radius of gyration (in cm) with respect to the origin of the given array of masses located at the given points on the x-axis.31.2 g at (-3.03, 0), 51.4 g at (2.62, 0), 76.0 g at (4.56, 0)

A. I = 2220 g? cm2; R = 3.74 cm B. I = 387 g? cm2; R = 2.04 cm C. I = 30,300 g? cm2; R = 13.8 cm D. I = 387 g? cm2; R = 1.56 cm

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Mathematics

Express in simplified form. Assume that all variables represent positive real numbers. -

A. -3xy2 + 
B. -3xy2
C. 3xy2
D. 3xy2

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Solve the problem.The volume of wood, V, obtained from a tree varies jointly as the height, h, and the square of the girth (the distance around the tree trunk), g. If the volume is 38.4 ft3 when the height is 30 ft and the girth is  what is the volume when the height is 40 ft and the girth is 6 ft?

A. 110.96 ft3  B. 117.55 ft3  C. 115.2 ft3  D. 118.2 ft3 

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Mathematics