Find the product of 2/5 with the quotient of 7/3 and 4/5

What is a rational number between 9.5 and 9.7

Asap! i'm not good math and i'm lost.

If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32