Step-by-step explanation:
8 goes in the place of thousands
5 goes in the place of hundred thousands
And 1 goes in the place of ten thousands
Answer:

Step-by-step explanation:
Point slope form:

<em>Note: </em>
- <em>m represents the slope</em>
- <em>(x1,y1) represents the coordinate point</em>
Our answer would be 
E.5 hours
All you have to do is subtract 85 from 510 till you have 0