3 years ago

mr potters class has a test today for 1 1/2 hours. they have lunch at 11:40 what time should they start the test at

2 answers:

8 0

If they plan to start the test before lunch, then they should start at 10:10, because 11:40 subtracted by 1 1/2 hour or 1:30 will equal 10:10.

dybincka [34]3 years ago

3 0

If they plan to start the test before lunch, then they should start at 10:10

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3 years ago

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3 years ago

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julia-pushkina [17]

Answer:

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Step-by-step explanation:

$\tan \: 30 \degree = \frac{x}{10 \sqrt{3} } \\ \\ \frac{1}{ \sqrt{3} } = \frac{x}{10 \sqrt{3} } \\ \\ \sqrt{3} x = 10 \sqrt{3} \\ \\ x = \frac{10 \sqrt{3} }{ \sqrt{3} } \\ \\ x = 10 \\ \\ \cos 30 \degree = \frac{10 \sqrt{3} }{y} \\ \\ \frac{ \sqrt{3} }{2} = \frac{10 \sqrt{3} }{y} \\ \\ y = 10 \sqrt{3} \times \frac{2}{ \sqrt{3} } \\ \\ y = 10 \times 2 \\ \\ y = 20$