April is training for a marathon by running no less than 55 km per week. she runs at an average rate of 10 km per hour. what is the minimum number of hours, h, she should run.
if you guys would like i could also post the answer choices, just comment.

5.5 hours

Step-by-step explanation:

Given: April is training for a marathon by running no less than 55 km per week.

Let the number of hours be 'h'.

Then if she runs at an average rate of 10 km per hour.

Then the total running in a week = 10h

According to the question

 

Divide 10 on both the sides, we get

Thus, the minimum number of hours she should run= 5.5

So what you first want to find is the area of her garden.

You can do this with the formula length * width

In this case it would be:

36 * 22 

Which is equal to 792.

Now, you just want to find how many bags of topsoil she needs.

Since I'm assuming you cannot buy half of a bag of topsoil, she will end up buying extra topsoil, because you can't just cut a bag of topsoil in half and then take some of it, then buy that.

So to have enough, she must buy 3 bags of top soil, which would end up costing $9.