(this is 12 year old math)
please help. ​

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

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.

Evaluate this using ! 0.25^2 x 2.4 + 0.25 x 2.4^2 − 0.25 x 2.4 x 0.65