PLS help **65 Points **

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¯¯¯¯¯¯¯¯)?

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4

Which expression is rational? 6. , square root two, square root 14, square root 49