Describe the motion seen in the graph below.

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

what is the actual question though?

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

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