3 years ago

Can someone please help me with this :( asap

Mathematics

1 answer:

Rama09 [41]3 years ago

7 0

こんにちは

mmmmmmmmnnnnnnnnnnnnnnnnnnnnnnn

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V1=30km/hr
v2=20km/hr
v=2v1v2/(v1+v2)
=2*30*20/(30+20)
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3 years ago

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REY [17]

<u>Answer:</u>

The correct answer option is B. 0.21.

<u>Step-by-step explanation:</u>

We are to find the value of $cos \theta$ using the law of cosines.

We know that the formula of the cosine rule is given by:

$c ^ 2 = a ^ 2 + b ^ 2 - 2 a b cos C$

So substituting the given values in the above formula:

$10.9 ^ 2 = 5.8 ^ 2 + 10.5 ^ 2 - 2 (5.8) (10.5) cos C$

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$118.81 - (33.64+110.25) = -121.8cosC$

$118.81-143.86=-121.8cosC$

$cosC=\frac{-25.05}{-121.8}$

cos C = 0.21

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3 years ago

Find the volume of the sphere. Use 3.14 for π. Round to the nearest tenth.

kiruha [24]

Answer: The answer is 904.32

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3 years ago

Paul predicts that n stalks of corn planted together will produce (2n2–2n)(2n2–2n) ears of corn. If Paul plants three corn plant

Free_Kalibri [48]

Given that the production of n stalks of corn planted has been modeled by (2n^2-2n), then the approximate ears of corn produced by 3 stalks will be given by:
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2(3)^2-2(3)
simplifying we get:
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3 years ago

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