The side lengths of a rectangular room are 8 ft and 15 ft. The room is going to be split in half along the hypotenuse of a triangle using string. Find the length of the piece of string needed.

What is the length of the string going across the middle of the room?

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.