Solve the problem.The volume of wood in a tree varies jointly as the height of the tree and the square of the distance around the tree trunk. If the volume of wood is  when the height is  and the distance around the trunk is  what is the volume of wood obtained from a tree that is  tall having a measurement of 

src="https://sciemce.com/media/4/ppg__10627192021__f1q116g5.jpg" alt="" style="vertical-align: -4.0px;" /> around the trunk?

A. 69 ft3
B. 60 ft3
C. 64 ft3
D. 52 ft3

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Answer: B

Mathematics

An account contains A dollars and increases or decreases by R%. For A and R:  (a) Find the increase or decrease in the value of the account.  (b) Find the value of the account.  (c) By what factor did the account value increase or decrease? A = $200, R = 180%

A. (a) $385; (b) $585; (c) 3.8 B. (a) $370; (b) $570; (c) 1.3 C. (a) $360; (b) $560; (c) 2.8 D. (a) $310; (b) $510; (c) 1.8

Solve the linear system by using an inverse matrix.

A. {(-1, 2, 1)} B. {(2, -1, 4)} C. {(2, 1, 6)} D. ?

Determine whether the graph is the graph of a function.

A. Not a function B. Function

Find the limit. 

A.
B.
C.
D.