A daredevil jumps off the CN Tower and falls freely for several seconds before releasing his parachute. His height, h, in meters, t seconds after jumping can be modeled by: h(t) =-4.91? + + + 360 before he released his parachute; and h(t) = -4t + 142 after he releases his parachute. How long after he jumped did he release his parachute?

Eileen purchased 3.4 pounds of apples at the total cost of $19.72. if she purchases 6.2 pounds of apples at this store, how much would it cost?

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'

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