What are the significant numbers
5 700.050

7 sigfigs

Explanation:

I used the Pacific Atlantic rule.

P if the decimal is present

A if the decimal is absent

Pacific Ocean (Number) Atlantic Ocean

5700.050 has a decimal. I started from the Pacific side of the number, cross out all the zeros until you get to a non zero digit and those will be your sigfigs!

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

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.