i don't get 2 use the rate 380 miles in 5 hours 2 find the unknown number for each equivelent rate round to the nearset tenth

I don't get your question. What "equivalent rates" are you talking about?

380 miles in 5 hours is an average speed of 76 miles per hour.

72 cookies in 3 hours what is the rate

To find the rate, you need to divide the number of cookies by the number of hours it took to make or consume them. In this case, the rate would be calculated by dividing 72 cookies by 3 hours.

Rate = Number of cookies / Number of hours

Rate = 72 cookies / 3 hours

By dividing 72 by 3, you would get the rate:

Rate = 24 cookies per hour