$322 ; You can multiply 2300 * 0.14 (decimal version of 14%) to get how much money Mark needs to put in the account.
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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