SOLUTION: Could you help me out with these two problems. I don't get it. 1. At a height of h meters, you can see V kilometers to the horizon. These numbers are related by the equation V=3.5

Algebra ->  Algebra  -> Rational-functions -> SOLUTION: Could you help me out with these two problems. I don't get it. 1. At a height of h meters, you can see V kilometers to the horizon. These numbers are related by the equation V=3.5      Log On

Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!
Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

   

Question 194611: Could you help me out with these two problems. I don't get it.
1. At a height of h meters, you can see V kilometers to the horizon. These numbers are related by the equation V=3.5sqrt(h). A person can see 364 km to the horizon from an airplane window. How high is the airplane?
The airplane is__ meters high.
2. The formula r=2sqrt5L can be used to approximate the speed r, in miles per hour, of a car that has left skid marks of length L, in feet. How far will a car skid at 50 mph?
The car will skid _feet. Thank you!
Answer by nerdybill(6962) About Me  (Show Source):
You can put this solution on YOUR website!
1. At a height of h meters, you can see V kilometers to the horizon. These numbers are related by the equation V=3.5sqrt(h). A person can see 364 km to the horizon from an airplane window. How high is the airplane?
.
The problem gives you V (364) you just need to find h:
364=3.5sqrt%28h%29
104=sqrt%28h%29
10816+=+h
The airplane is 10816 meters high.
.
2. The formula r=2sqrt5L can be used to approximate the speed r, in miles per hour, of a car that has left skid marks of length L, in feet. How far will a car skid at 50 mph?
50+=+2+sqrt%285L%29
25+=+sqrt%285L%29
625+=+5L+
125+=+L+
The car will skid 125 feet.