Calculate the amount of work done when a pressure of 75 PSI causes a piston to change the volume of a cylinder from 55 in3 to 175 in3?

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Explanation:

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

well clustered together.

points close on a scatter diagram