Nate’s work to solve a math problem is shown below.

problem: leona traveled 25 miles in 2/3 of an hour. what was her average speed in miles per hour?

what was nate’s first error?
a-he used division instead of multiplication to model the problem in step 1.
b-he switched the divisor and the dividend when creating an equation to model the problem in step 1.
c-he replaced the wrong term with its reciprocal in step 2.
d-he should not have changed division to multiplication in step 2.

and
which question is best modeled with a division expression?
a-how many 3/8's are in 48?
b-what is 3/8 of 48?
c-what is the total of 3/8 and 48?
d-how much more than 3/8g is 48?