Find the Volume of the rectangular prism(in cubic feet)

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

Need this asap if anyone can i would be very grateful. if you could show workings that would really

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¯¯¯¯¯¯¯¯)?