After its second bounce, a ball reached a height of 80 cm. The rebound factor for the ball was 0. 7. From approximately what height, in cm, was the ball dropped?

a. 34

b. 49

c. 115

d. 163

Can someone me out here and the tell me the greatest common factor

Which ordered pair is a solution of the equation? y + 5 = 2(2+1) choose 1 answer ® only (5,10 ® only (-1,-5) © both (5, 10) and (-1,-5) 0 neither

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.