four friends got take-out from an italian restaurant. they bought a pizza for $15.50, pasta for $16.05, chicken for $20.25, and salad for $8.20, and paid a 10% sales tax. they split the bill evenly. how much did each friend pay?

Astudent simplified a rational expression as shown.

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

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