20 customers are eating dinner at a local restaurant. the restaurant accepts cash or credit as forms of payment. of the 20 customers, 4 have enough cash to pay for their meal, 16 have a credit card, and 3 have enough cash and a credit card. using this information, answer each of the following questions.
let a be the event that a randomly selected customer has enough cash and b be the event that a randomly selected customer has a credit card.

What is the circumference of the pie

Abusiness plan is centered around a circular area of distribution. the plan calls for the radius of the distribution to increase 50 miles per year. the investors have asked that the plan include a reference to the area of distribution based on the number of years in business. these functions model this plan: radius in y years: r(y) = 50y total area: a(r) = πr2; r in miles what is a(r( the total area in y years? a(r(y)) = 50πy2 a(r(y)) = 2,500πy2 a(r(y)) = 50πr2 a(r(y)) = 2,500πr2

You randomly draw a marble from a bag of marbles that contains 77 blue marbles, 22 green marbles, and 11 red marble. what is \text{p(not draw a blue marble})p(not draw a blue marble)?