Mateo is studying a human hair with a diameter of 6.5 x 10^-4 inches and a horse hair with a diameter of 1.3 x 10^-3 inches. Which statement is true?
a)The horse hair is 2 times as thick as the human hair.
b)The horse hair is 5 times as thick as the human hair.
c)The human hair is 2 times as thick as the horse hair.
d)The human hair is 5 times as thick as the horse hair.
