When an earthquake occurs, energy radiates in all directions from its source, which is called the _

as technology advances, new experiments often expose problems in accepted theories. c

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-lavira: )

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