I think is letter A l hope it works.
6 because you set them equal and solve
16=8
first you need to get rid of the parenthesis by doing distributive property which gives you -4x+16=8-4x next you cancel equal terms which is -4x so then you get
16=8 btw the equation would be false
The same as the last question. B the second option.
The formula of a volume of a cone:

We have r = 5m and H = 6m. Substitute:
