Simplify the expression 
A) 4
B) –12
C) 1
D) –108
E) The expression cannot be simplified.
B) –12
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Evaluate.
A. -1
B. 
C. 1
D. 0
Write the logarithmic equation in exponential form.y = log (2x)
A. y10 = 2x B. 10 y = 2x C. 102x = y D. 2x y = 10
Determine whether the graph is that of a function.
A. function B. not a function
Solve the problem.The amount of tin A (in square inches) needed to make a tin can with radius r inches and volume 25 cubic inches can be found by the function 
Find the difference quotient when r = 2.6 in. and 
Use 3.14 for ?. Interpret the result.
A. At r = 2.6 in., A is decreasing at 26.2 in.2 per 1 in. increase in r. B. At r = 2.6 in., A is increasing at 262 in.2 per 1 in. increase in r. C. At r = 2.6 in., A is decreasing at 262 in.2 per 1 in. increase in r. D. At r = 2.6 in., A is increasing at 26.2 in.2 per 1 in. increase in r.