Answer:
We are missing 210
Step-by-step explanation:
3*4 = 12
3*70 =210
3*300=900
We are missing 210
The length of the trail is 98.5 KM, all you need to do is divide the total distance by the number of times she went on it.
Answers: 
1. Switch sides

2. Subtract by 8 from both sides of equation.

3. Simplify.

4. Multiply by -1 from both sides of equation. (it's should be the reverse inequality).

5. Simplify.

6. Then you had to divide by 9 from both sides of equation.

7. Simplify.

8. Divide by the numbers.



9. Divide by the numbers.



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The correct answer is 720 I did this problem long time ago hope this helps :)
Answer C cause I remember