What is an irrational number that is between 9.5 and 9.7 and why

The step function g(x) is defined as shown.what is the range of g(x)? ***answer choices in picture.

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882