Stuart paid $ 48.00 for a new tennis racket ,which was 64% of the original price what was the original price of the racket.

First, you take the price that Stuart paid, $48, and multiply it by 64%. Since this is a percentage, you would multiply it like this: 48 X 0.64. This will come out to 30.72. You then take 30.72, and since you are trying to find the ORIGINAL price, you would add this new number to the original. So 48 + 30.72 = $78.72

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since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.

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