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-BARSIC- [3]
3 years ago
7

I don't understand this problem on my homework can explain to me how to solve it?

Mathematics
1 answer:
user100 [1]3 years ago
8 0
So he worked 30.5 hours, he just didn't write some of the hours down. To find the hours he didn't write down, you subtract 8+7\frac14+ 8\frac12 from 30.5, which equals 6 \frac14

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The reference angle for <span>240∘</span> is <span>60∘</span> (since <span><span>240∘</span>=<span>180∘</span>+<span>60∘</span></span>)

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<span><span>cos<span>(<span>240∘</span>)</span></span>=−<span><span>12</span></span></span>

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