Koen is training for a track meet. Last month, he ran for five and a half hours. He averaged a speed of eight miles per hour. How many miles did Koen run? A.
40 miles
B.
44 miles
C.
8 miles
D.
13.5 miles

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different