Solve the problem.Write an expression for the area of the shaded region and express it in factored form.
A. (y + 10)(y - 10)
B. y2 + 100
C. (y - 10)2
D. (y + 10)2
Answer: A
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Solve the problem.The equation for free fall at the surface of Planet X is 
with t in seconds. Assume a rock is dropped from the top of a 
cliff. Find the speed of the rock at 
A. 25.97 m/sec B. 54.94 m/sec C. 53.94 m/sec D. 26.97 m/sec
Write the negation of the quantified statement. (The negation should begin with "all," "some," or "no.")Some mammals are horses.
A. No mammals are horses. B. No horses are mammals. C. Not all mammals are horses. D. All horses are mammals.
Solve and check.12n2 + 33n = 0
A. - 
, 0
B. 0
C. - 
D. - 
, 33
Solve the problem. Use the correct number of significant digits.Assume that the volume of Earth is5.0 × 1014 cubic meters and the volume of a bacterium is2.5 × 10-16 cubic meters. If Earth could be filled with bacteria, how many would it contain?
A. 2.0 × 1030 bacteria B. 2.0 × 10-30 bacteria C. 5.0 × 1031 bacteria D. 5.0 × 10-31 bacteria