2. 12 more than 5 times c

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

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¯¯¯¯¯¯¯¯)?

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?