john is trying to determine the length of a staircase he will need for a deck that is 3.5 feet high. he wants to start the staircase 3 feet from the deck. the length of the stair case is

could you provide figure.

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft

i got so much points from yo a.