Could someone please help me with both of these questions quickly please

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

What is the volume of a cone with a height of 6 cm in the radius of 2 cm

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)