Respuesta :

dancegirllizzie

Answer:

[tex]\sqrt{416}[/tex] ft

or about 20.396ft when rounded to the third decimal place

Step-by-step explanation:

(assuming the question is to find the ladder's length)

let "l" be the ladder's length

[tex]20^{2} + 4^{2} = l^{2}[/tex]

[tex]400 + 16 = l^{2} = 416[/tex]

[tex]l = \sqrt{416}[/tex] ft