On monday a toy store sold 4 race cars. on tues it sold 8 race cars. on wed it sold 16 race cars. suppose this pattern continues. how many race cars will be sold on fri? describe a rule then solve

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