Perform the operations.12 ? 7 - (13 - 10) ÷ 3 - (9 - 8)
A. 82
B. 66
C. 18
D. 26
Answer: A
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Solve the problem.The area of a circle with radius r is given by the function A(r) = ?r2. Find the area of the base of a circular storage tank if the radius is 5 feet long. Use ? ? 3.14.
A. 78.5 square feet B. 15.7 square feet C. 31.4 square feet D. 75 square feet
A stream of water moving at the rate of v feet per second can carry particles of size 
inches. Find the size of the largest particle that can be carried by a stream flowing at the rate of 
foot per second. (Round your answer to three decimal places.)
?
A. 0.067 B. 0.087 C. 0.047 D. 0.057 E. 0.077
Find the derivative of y with respect to x.y = tan-1 (ln 2x)
A. 
B. 
C. 
D. 
Decide whether or not the given equation is an identity.sin(x + 2?) = sin x
A. Yes B. No