Grace runs 6miles in 2 hours what is her speed??

3 miles/hr

Explanation:

This is a distance-rate-time problem, so we need to use the equation: d = rt, where d is the distance, r is the rate, and t is the time.

Here, the distance is 6 miles, so d = 6. The time is 2 hours, so t = 2. Plug these in to find r:

d = rt

6 = 2r

r = 6/2 = 3

Grace's speed is thus 3 miles/hr.

Hope this helps!

oh it is true if thats what you are asking

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.