What are three fractions that are greater than 2/3 but less than 16/12

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¯¯¯¯¯¯¯¯)?

Find the difference (8ab+a+2) - (3ab+6)

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base