Help pls . Question in the picture. No one will help :/ I really need this.

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.

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)