An environmental scientist obtains a sample of water from an irrigation canal that contains a certain type of bacteria at a concentration of 8 per milliliter. Fine the mean number of bacteria in a 5 milliliter sample

It creates dogx^2 and then flip your answer and multiply by 2

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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.