For Questions 5-7:
The number on the outside of the circle represents the length of the arc. Notice that you aren't given the central angle: you're going to have to solve to find it. Start with the formula for the length of an arc. Plug in the arc length and the radius, and solve for theta. Conveniently, this puts theta in radians, which is what we want it to be in anyway. Then, plus in the theta and the radius back into the formula for the area of the sector, and find the area (putting the correct units on at the end!).
You can use this strategy for all 3 questions.
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