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Romashka [77]
3 years ago
6

What number can you multiply by π to get a rational number?

Mathematics
2 answers:
Stolb23 [73]3 years ago
8 0
1\pi and 0
barxatty [35]3 years ago
3 0

Solution:

0 is the correct option.

Explanation:

We have been given the number  π, which is an irrational number. The value of  π is 3.14

Now, let us multiply the number  π with the given numbers in option and see what type of number we get.

0\times \pi = 0\\\\1\pi \times \pi = \pi^2\\\\-\pi \times \pi = -\pi^2\\\\2\times \pi = 2\pi

Among all the above result, only 0 is a ration number.

Hence, when we multiply 0 with  π then the result will be a rational number.

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An angle measures 114° less than the measure of its supplementary angle. What is the measure of each angle?
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Step-by-step explanation:

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Last Friday Trevon had $29. Over the weekend he received some money for cleaning the attic. He now has $41. Write an algebraic e
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Step-by-step explanation:

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6 0
2 years ago
Find the value of n, correct to 4 significant figures.​
Law Incorporation [45]

Answer:

6.708

Step-by-step explanation:

  • Y varies directly as the square of x (Given)

  • \implies y\:\alpha \:x^2......(1)

  • Y varies inversely as the square root of z (Given)
  • \implies y\:\alpha\: \frac{1}{\sqrt z}......(2)

  • Combining (1) & (2), we find:

  • y\:\alpha \:\frac{x^2}{\sqrt z}

  • \implies y=\frac{kx^2}{\sqrt z} (Where k is constant of proportionality).....(3)

  • Now, when y = 2, x = 3 and z = 4, we find the value of k i.e. constant.

  • 2=\frac{k(3)^2}{\sqrt 4}

  • \implies 2=\frac{k(9)}{2}

  • \implies k =\frac{4}{9}

  • Plugging the value of k in (3), we find:

  • y=\frac{4x^2}{9\sqrt z} ....(4)

  • Next, in equation (4), plug y = 5, x = n and z = 16 and obtain the value of n by solving it.

  • 5=\frac{4(n)^2}{9\sqrt {16}}

  • \implies 5=\frac{4(n)^2}{9(4)}

  • \implies 5=\frac{(n)^2}{9}

  • \implies 5(9)=(n)^2

  • \implies 45=(n)^2

  • \implies n=\sqrt{45}

  • \implies n=6.70820393

  • \implies n\approx 6.708
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2 years ago
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