Special right triangles 30-60-90

Asphere has a diameter of 10 in. what is the volume of the sphere?

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

(03.03 mc) choose the graph below that correctly represents the equation 2x + 4y = 24. (5 points) select one: a. line through the points 0 comma 6 and 12 comma 0 b. line through the points 0 comma negative 6 and 12 comma 0 c. line through the points 0 comma negative 12 and 6 comma 0 d. line through the points 0 comma 12 and 6 comma 0