Abuilding has a ramp to its front doors to accommodate the handicapped. if the distance from the building to the end of the ramp is 22 feet and the height from the ground to the front doors is 5 feet, how long is the ramp? (round to the nearest tenth.) select one: a. 22.6 ft b. 21.4 ft c. 5.2 ft d. 7.1 ft

The answer is 22.6 ft. 
In case you wanna know how to do it, the easiest way for me is I draw like a diagram. So this one's a ramp, so I just drew a simple triangle. It says the distance from the building to the end of the ramp is 22 feet, meaning the base is 22 feet. then the height will be 5 feet, which is the vertical line of the triangle. and you don't know what the last one is, so let's call it c. Here's what your triangle should look like (It's really bad, cuz it's hard to do it on the computer, let's pretend the triangle is much longer and not as steep): 
|\ 
5 | \ c 
|__\ 
22
Ok, so you should've heard of pythagorean theorem - a^2 + b^2 = c^2 
a is 5, b is 22 so plug these numbers into the theorem : 5^2 + 22^2 = 509
Since 509 is c SQUARED, you have to find the square root of 509 which is 22.6! There's your answer hope I helped :D