A passenger in a hot-air balloon spots a small fire on the ground. The angle of depression
to the fire is 30°, and the height of the hot-air
balloon is 150 feet. To the nearest foot, what is
the horizontal distance from the hot-air balloon
to the fire?

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Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.

If np3 /nc2 = 6, find the value of n