8993.2x 10³ use the powers of ten rules please help iv been stuck on this

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

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

Which is the graph of this function 3 square root of x plus one if