Oscar spent two-thirds hour each night doing homework for five nights this week. How many hours of homework did Oscar complete this week?

Multiplying an even number of negative numbers gives an answer that is choose from:

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.