Plz help solve,
velocity units are ft/min
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Which is the completely factored from of xy^3-x^3y

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¯¯¯¯¯¯¯¯)?

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?