Multiply and simplify.
A. 
B. 
C. 
D. 
Answer: A
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Compare the right-hand and left-hand derivatives to determine whether or not the function is differentiable at the point whose coordinates are given.
y = xy = 2x
A. Since limx?0+ f '(x) = 2 while limx?0- f '(x) = 1, f(x) is not differentiable at x = 0. B. Since limx?0+ f '(x) = -2 while limx?0- f '(x) = -1, f(x) is not differentiable at x = 0. C. Since limx?0+ f '(x) = 1 while limx?0- f '(x) = 2, f(x) is not differentiable at x = 0. D. Since limx?0+ f '(x) = 1 while limx?0- f '(x) = 1, f(x) is differentiable at x = 0.
Simplify the expression using the imaginary unit i.
A. 4
B. -4i
C. -4
D. 4i
Round the whole number to the given place value.9997, tens
A. 9990 B. 10,000 C. 10,090 D. 100,000
The pictograph shows the number of bicycles sold at Mountain Biking Mania for a 7-week period. 
What was the total number of bicycles sold in this 7-week period?
A. 535 bicycles B. 545 bicycles C. 530 bicycles D. 520 bicycles