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jeka57 [31]
2 years ago
11

Julio believes that the quotient of 6 divided by 1/2 = 3. Explain Julios error and tell how to find the correct answer.

Mathematics
1 answer:
Gnom [1K]2 years ago
8 0

Answer:

it can be written as 6/1 divided by 1/2

then you'll use the keep, switch, flip method. keep 6/1, switch division to multiplication, and flip 1/2 to become 2/1 or 2

now your equation is 6 x 2 = 12

Julio did 6 divided by 2. which could've been fixed if he changed the division sign to multiplication and multiplied

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Answer:

y = \frac{\pi}{2}cos(\frac{2\pi}{3}x)

Step-by-step explanation:

Given

Amplitude = \frac{\pi}{2}

Period = 3

Required

Write the equivalent cosine function

The general formula is:

y = acos(bx)

Where

amplitude = |a|

period = \frac{2\pi}{b}

Substitute \frac{\pi}{2} for amplitude in amplitude = |a|

|a| = \frac{\pi}{2}

a = \frac{\pi}{2}

Substitute 3 for period in period = \frac{2\pi}{b}

\frac{2\pi}{b} = 3

<em>Multiply both sides by b</em>

2\pi = 3b

<em>Divide through by 3</em>

b = \frac{2\pi}{3}

Hence;

y = acos(bx) becomes

y = \frac{\pi}{2}cos(\frac{2\pi}{3}x)

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3 years ago
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Step-by-step explanation:

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A square steel bar has a length of 5.1 ft and a 2.7 in by 2.7 in cross section and is subjected to axial tension. The final leng
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Answer:

The Poisson's ratio for the material is 0.0134.

Step-by-step explanation:

The Poisson's ratio (\nu), no unit, is the ratio of transversal strain (\epsilon_{t}), in inches, to axial strain (\epsilon_{a}), in inches:

\nu = -\frac{\epsilon_{t}}{\epsilon_{a}} (1)

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\epsilon_{t} = l_{t,f}-l_{t,o} (3)

Where:

l_{a,o} - Initial axial length, in inches.

l_{a,f} - Final axial length, in inches.

l_{t,o} - Initial transversal length, in inches.

l_{t,f} - Final transversal length, in inches.

If we know that l_{a,o} = 61.2\,in, l_{a,f} = 61.235\,in, l_{t,o} = 2.7\,in and l_{t,f} = 2.69953\,in, then the Poisson's ratio is:

\epsilon_{a} = 61.235\,in - 61.2\,in

\epsilon_{a} = 0.035\,in

\epsilon_{t} = 2.69953\,in - 2.7\,in

\epsilon_{t} = -4.7\times 10^{-4}\,in

\nu = - \frac{(-4.7\times 10^{-4}\,in)}{0.035\,in}

\nu = 0.0134

The Poisson's ratio for the material is 0.0134.

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Step-by-step explanation:

Hope this is correct

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