human
Rudy runs 5 miles at a rate of 10 minutes per mile. Later he runs 4 miles at a rate of 9.5 minutes per mile. What is the total length of time that Rudy runs?
assistant
How many minutes does Rudy run for? ** Rudy first runs for 5 * 10 = <<5*10=50>>50 minutes.
How many minutes does Rudy run for? ** Then Rudy runs for 4 * 9.5 = <<4*9.5=38>>38 minutes.
How long does Rudy run for? ** Rudy runs for a total length of 50 + 38 = <<50+38=88>>88 minutes
#### 88