Jack and Jill both start at point A. They each walk in a straight line at an angle of 150° to each other. After an hour Jack has walked 4.5km and Jill has walked 6km. How far apart are they?

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