Kathy stood on the middle rung of a ladder. She climbed up 3 ​rungs, moved down 5 ​rungs, and then climbed up 9 rungs. Then she climbed up the remaining 4 rungs to the top of the ladder. How many rungs are there in the whole​ ladder?

There are fourteen rungs on the ladder

7

step-by-step explanation:

the answer would be 7

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