A bicyclist rides the same number of miles every minute. The ratio table below shows the number of miles she rides during
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Since the beacons rotate together, the angular speed is constant.
From the time you see the first beacon, you have to wait for the lighthouse to make 120°, i.e. 1/3 of a whole turn.
So, if T is the time it takes for the lighthouse to make a whole turn, the interval between the first and the second beacon is T/3.
The interval between the second and third beacon is the amount of time it takes to the lighthouse to make the remaining 2/3 of a turn, so that you'll see the first beacon again. So, this time is 2T/3
So, the ratio is
So, the time between the second and third beacon is twice as much the time between the first two.
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add this statement at the end...... "<span>Also, if she retires at 67, then there are 67-25=42 years of investment, which gives A=$53212.28"</span>
add this statement at the end...... "<span>Also, if she retires at 67, then there are 67-25=42 years of investment, which gives A=$53212.28"</span>