The radius of the planet is 4100 miles. find the distance d to the horizon that a person can see on a clear day from a height of 1298 feet above the planet. (hint: use the conversion 1 mile = 5280 ft) round your answer to the nearest 10th, and don't forget to convert feet to miles.

First, we are going to convert 1298 feet to miles. Since we know that 1 mile = 5280 ft, we are going to multiply 1298 ft by  to do that:


Next, we are going to set up a right triangle using the radius of the Earth and the distance above the planet.
The hypotenuse of our triangle will be the radius of the Earth + the distance above the planet. One of the legs of our triangle will be the radius of the Earth, and the other leg, , will be the distance that a person will see on a clear day.
Using the Pythagorean theorem:


miles

We can conclude that the distance, , to the horizon that a person can see on a clear day from a height of 1298 feet above the planet is 44.9 miles.