Ava and some friends hiked to the top of a waterfall. They hiked 8.2 kilometers from the car to the top. On the way back to the car, they took a different route that was 9.4 kilometers long. How far did they hike in all?

17.6

Step-by-step explanation:

You have to add the two distances they traveled to find the total distance.

8.2 + 9.4 = 17.6

answer rather than having to add and subtract the measurements of the semi-circle, notice that the semicircle to the left of ad is actually identical in area to the blank semicircle-shaped space to the left of bc. so if we transferred the red semicircle into the blank space, we would end up with a square of side length 24 cm. the area of a square is s^2 = 24^2 = 676 cm^2.

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