An electric furnace has a return air (air entering the furnace) temperature of 70 degrees. the supply air (air leaving the furnace) is measured at 117 degrees. what is the temperature rise in degrees)?

Describe the relationship between the angles of similar triangles and the sides of similar triangles

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.

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