Which of the following expressions is equal to - x^2-4? A. (-x-2i)(x+2i)
B. (-x-2i)(x - 2i)
C. (x + 2i)(x - 2i)
D. (-x +2i)(x-2i)

Darian wants to build a regulation size pool table that is 9 feet in length. he plans he ordered are 18 by 36 inches. what is the scale factor of the dilation he must use to build a regulation pool table

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.

Select the number of ways in which a line and a circle can intersect