HELP ASAP PLZZZ What is the length of AB?

A.) 12 units
B.) 14 units
C.) 10 units
D.) 6 units

Amanager recorded the number of bicycles sold by his company each quarter. his projected sales after t years is given by the expression below. which of the following statements best describes the expression? a. the initial sales of 575 bicycles increases at the rate of 4% over 4 quarters. b. the initial sales of 575 bicycles increases at the rate of 18% over 4 years. c. the initial sales of 575 bicycles increases at the rate of 4% over t quarters. d. the initial sales of 575 bicycles increases at the rate of 18% over t years.

Select the lengths in centimeters that would form a right triangle

We just started the introduction into circles and i have no idea how to do this.