A ladder that is 21 feet long is propped against a building. The bottom of the ladder was placed 4 feet from the base of the building. How high up on the building does the ladder reach? Round the answer to the nearest tenth of a foot. 4. 1 feet 17. 0 feet 20. 6 feet 21. 4 feet.

correct answer:

a + bi

step-by-step explanation:

use pothagarean therom

a^2+b^2=c^2 so first ac

acm is a right triangle because c= 90°

and am (the hypotenuse or c) =16+9 =25

but there is not enough info we need another angle or side length

jeff jeff

step-by-step explanation:

4+4+2x

or

2x+8

step-by-step explanation: