2possible factors for the estimated product of 2800

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¯¯¯¯¯¯¯¯)?

At a book fair, joe bought 24 books at 3 for $5 and had $2 left. how much money did he have at first?

Which is true regarding the graphed function f(x)?