Simplify the following: (-8z)^2
A. – 64z^ 2
B. 16z
c. 16z^2
D. 64z^2
E. –16z^2
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The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =

Find the least common denominator for thesetvo rational expressions.n^2/n^2+4n+4 -3/n^2+7n+10