If 20% of some value is 400, then what is the missing value? In part (a), is the number 400 the part or the whole?

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.

Math each whole number with a rational, exponential expression

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76