Look at the figure below:

What is the length, in units, of segment CD?

11
7.2
5.5
10

pls help

Pls super important solve the botton one

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

Multiply. write your answer in simplest form. 3/8 x 5/7