Amine extracts 2 metric tons of coal in an hour. the mine uses    ton of the extracted coal every hour to generate electricity for the mine and sells the rest. if t is the number of hours spent mining, which expression represents the amount of ore sold? how much ore can the mine sell after extracting ore for 12 hours?

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

Aroulette wheel has 38 slots in which the ball can land. two of the slots are green, 18 are red, and 18 are black. the ball is equally likely to land in any slot. the roulette wheel is going to be spun twice, and the outcomes of the two spins are independent.the probability that it lands one time on red and another time on black in any order is(a) 0.5 (b) 0.25 (c) 0.4488 (d) 0.2244