Pls help me for 20 points

On a architect's drawing of a house, 1 inche representa 1.5

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¯¯¯¯¯¯¯¯)?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?