Solve the problem.The volume V of a right circular cylinder of height 2 and radius r is V(r) = 2?r2. Find the instantaneous rate of change of volume with respect to radius r when r = 7. Express the answer in terms of ?.

A. 98? ft3/ft
B. 32? ft3/ft
C. 28? ft3/ft
D. 23? ft3/ft


Answer: C

Mathematics

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Graph the system of linear inequalities and indicate the solution set.x - y ? 4x + y ? 10

A.

B.

C.

D.

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Solve the triangle. 

A. A = 51°, B = 87.2°, C = 41.8° B. A = 51°, B = 41.8°, C = 87.2° C. A = 41.8°, B = 87.2°, C = 51° D. A = 41.8°, B = 51°, C = 87.2°

Mathematics

Divide. Write the answer in lowest terms and as a whole or mixed number where possible. ÷ 

A.
B.
C. 10
D. 3

Mathematics

Write the binomial expansion of the expression.(3x2 - y)5

A. 243x10 + 405x8y + 270x6y2 + 90x4y3 + 15x2y4 + y5 B. - 243x10 + 405x8y - 270x6y2 + 90x4y3 - 15x2y4 + y5 C. 243x10 - 405x8y - 270x6y2 - 90x4y3 - 15x2y4 - y5 D. 243x10 - 405x8y + 270x6y2 - 90x4y3 + 15x2y4 - y5

Mathematics