Deirdre works for a moving company. Her job includes giving clients a price for their move. Deirdre has one function, h(r)=4r, which gives the number of hours h to pack up a number of rooms r. She has a second function, c(h)=40h, that gives the price c for the number of hours of packing h. What is the function that gives the price c for a number of rooms r?

c(r)=10r
c(r)=36r
c(r)=160r
c(r)=40r+4