Can anyone help with problem 9.9 in the middle pls

Write a function that matches the description. a cosine function has a maximum of 5 and a minimum value of -5. f (r) =

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 value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i