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notka56 [123]
3 years ago
6

A drinking water project construct a cubical tank of 20m long what is the capacity of the tank​

Mathematics
1 answer:
earnstyle [38]3 years ago
4 0
3.45 is the answer I think

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Find the angle between the vectors u=i-9j and v=8i+5j
Katyanochek1 [597]

Answer: \cos^{-1} \left(\frac{-37}{\sqrt{7298}} \right) \approx 115.665^{\circ}

Step-by-step explanation:

u \cdot v=(1)(8)+(-9)(5)=-37\\\\|u|=\sqrt{1^{2}+(-9)^{2}}=\sqrt{82}\\\\|v|=\sqrt{8^{2}+5^{2}}=\sqrt{89}\\\\\cos \theta=\frac{-37}{\sqrt{82}\sqrt{89}}\\\\\theta=\cos^{-1} \left(\frac{-37}{\sqrt{82}\sqrt{89}} \right)\\\\\theta=\boxed{\cos^{-1} \left(\frac{-37}{\sqrt{7298}} \right) \approx 115.665^{\circ}}

7 0
2 years ago
A factory produces bottled water at a rate of 2,000 cases per hour. They know that 1.14% of the cases must be rejected because a
IRINA_888 [86]
1.14 per 100 or 1.14:100 or \frac{1.14}{100}

\frac{1.14}{100} =  \frac{n}{2000}

I will multiply the numerator by 20 because multiplying by 20 is how 100 became 2000
22.8 cases are rejected per hour.
4 0
4 years ago
Please help! In the question you have to find whether the number is either rational or irrational.
Mnenie [13.5K]

Answer:

Square root of 30 is irrational because the answer is a non-terminating decimal.

4/7 is rational because it is a fraction.

21 divided by the square root of 4 is irrational because the result is a non-terminating decimal.

Pi is irrational because it's a non-terminating decimal.

-27 is rational because rational numbers can be positive or negative.

I hope this is correct! :-)

4 0
3 years ago
4 to the power of 2 -3 (7+4)
leva [86]

Answer:

-17

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
What is the area of the hexagon?<br><br><br><br> 60 m 2<br> 80 m 2<br> 100 m 2<br> 120 m 2
romanna [79]

Answer:

the answer is 120m 2 that your answer.

3 0
3 years ago
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