An object has a mass of 20,000kg and a density of 4000kg/m? What is its
volume?

it breaks and dirupture other materials and other sencews from the bottom

a is the best answer your welcome

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form

because if the tool that you are using is not balanced it there would be false mass.