Simplify this rational expression. Factor completely

What is the first step of an indirect proof of a number that is divisible by two

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

Find the distance from the theater to the library. leave your answer in simplest radical form if necessary. 12 √12 74 √74