Ariel has already spent 79 minutes on the phone and she expects to spend 4 more minutes with every phone call she routed. in all, how many phone calls does ariel have to route to spend a total of 131 minutes on the phone.

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.

What is the volume of a cone with a height of 6 cm in the radius of 2 cm