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2 years ago

Use graph to answer questions

Mathematics

1 answer:

shutvik [7]2 years ago

3 0

Answer:

$\sin( \alpha ) = \frac{4}{5}$

Step-by-step explanation:

as if we form an imaginary triangle with this line as hypotenuse

we get

base = 3 units
perpendicular = 4 units

using Pythagoras theorem:-

hyponteuse ² = perpendicular ² + base²

hyp² = 4² + 3²

hyp² = 16 + 9

$hyp = \sqrt{25}$

hyp = 5 units

$\sin( \theta ) = \frac{perpendicular}{hypotenuse} \\ \sin( \theta) = \frac{4}{5}$

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2 years ago

A quality analyst of a tennis racquet manufacturing plant investigates if the length of a junior's tennis racquet conforms to th

Burka [1]

Answer:

Confidence interval : $21.506$ to $24.493$

Step-by-step explanation:

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Sample standard deviation = $\sqrt{\frac{\sum(x-\bar{x})^2}{n-1}}$

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