3 years ago

HELPPPP PLZzzzzzzzzzzzz

Mathematics

1 answer:

AleksandrR [38]3 years ago

5 0

On scientific thing that can be solved through the use of technology is Pollution.

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Round Nine Point Four Two To one decimal Place

gulaghasi [49]

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3 years ago

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What is the volume, in cubic m, of a rectangular prism with a height of 15m, a width of 4m, and a length of 13m?

just olya [345]

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3 years ago

Please help! 30 points!

Rashid [163]

Answer: $64.2^{\circ}$

Step-by-step explanation:

According to the cosine rule

$\cos C=\dfrac{a^2+b^2-c^2}{2ab}$

Here, $a=83, b=111, c=165,\ C=180^{\circ}-\theta$

Putting values

$\Rightarrow \cos (180^{\circ}-\theta)=\dfrac{83^2+111^2-165^2}{2\times 83\times 111}\\\\\Rightarrow \cos(180^{\circ}-\theta)=\dfrac{6889+12321-27225}{18426}\\\\\Rightarrow \cos(180^{\circ}-\theta)=\dfrac{-8015}{18426}=-0.4349\\\\\Rightarrow 180^{\circ}-\theta=\cos^{-1}(-0.4349)=115.77^{\circ}\\\Rightarrow \theta=64.23\approx 64.2^{\circ}$