Three gallons of paint are used to paint 16 wooden signs. how much paint did each sign use. between what two whole numbers does the answer lie?

 Given Question: Three gallons of paint are used to paint 16 wooden signsNow, let's solve how much paint did each sign use and between what two whole numbers does the answer lie?=> 3 gallons of paints : 16 wooden sign.First let's identify how many gallons of paints will it needs to be able to paint a single wooden signs.=> 3 gallons / 16 wooden signs = 0.19 gallons of paint per wooden sign.For the second question, i don't know what you mean. 

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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.