What is the ratio of surface area to volume for a sphere with the following
measurements?
surface area = 300 m2
volume = 500 m3

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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.