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nadya68 [22]
3 years ago
14

PLEASE HELP 50/25 POINTS!!

Mathematics
1 answer:
DedPeter [7]3 years ago
7 0
I don’t know but I think 5 feet
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Bills family is driving across the country on vacation . They plan to stop at historical sites in each state they drive through.
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Step-by-step explanation:

The total mileage of the trip = 3,000 miles.

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3 years ago
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torisob [31]

Answer:

\large\boxed{\cos\theta=\pm\dfrac{2}{3}}

Step-by-step explanation:

Use \sin^2x+\cos^2x=1.

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Substitute:

\left(\dfrac{\sqrt5}{3}\right)^2+\cos^2\theta=1\qquad\text{use}\ \left(\dfrac{a}{b}\right)^n=\dfrac{a^n}{b^n}\\\\\dfrac{(\sqrt5)^2}{3^2}+\cos^2\theta=1\qquad\text{use}\ (\sqrt{a})^2=a\\\\\dfrac{5}{9}+\cos^2\theta=1\qquad\text{subtract}\ \dfrac{5}{9}\ \text{from both sides}\\\\\cos^2\theta=\dfrac{9}{9}-\dfrac{5}{9}\\\\\cos^2\theta=\dfrac{4}{9}\to \cos\theta=\pm\sqrt{\dfrac{4}{9}}\\\\\cos\theta=\pm\dfrac{\sqrt4}{\sqrt9}\\\\\cos\theta=\pm\dfrac{2}{3}

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-2

Step-by-step explanation:

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borishaifa [10]

Answer:

The boat travels (300.4 km / 11 hours) which is 27.30909091 kilometers per hour,  So it would take 240 / 27.30909091 hours or 8.78828229 hours.  (Which rounds off to 8.79 hours)

Step-by-step explanation:

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3 years ago
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