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3 years ago

8

Samira buys a car the car loses 23% of its value in the first year. at the end of the first year her car is worth 6575.80 dollar

s how much did samira pay for her car?

1 answer:

Andreyy893 years ago

6 0

Answer: Samira paid $8540 for her car.

Step-by-step explanation:

Let x = Amount paid by Samira for her car.

Given: Depreciation rate = 23%

Worth of car after one year = $ 6575.80

As per given,

x - 23 % of x = 6575.80

⇒ x - 0.23x = 6575.80

⇒ 0.77x= 6575.80

⇒ x= $8540 [Divide both sides by 0.77]

Hence, Samira paid $8540 for her car.

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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

Andrej [43]

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)

$\epsilon_{a} = l_{a,f}-l_{a,o}$ (2)

$\epsilon_{t} = l_{t,f}-l_{t,o}$ (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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3 years ago

Rita earned 45 points on a test. she lost 8points, earned 53 points, then lost 6 more points what is Rita's final score on the t

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3 years ago

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AveGali [126]

Answer:

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Step-by-step explanation:

A)

Formula:

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∴The perimeter of the triangle =(4+2.75+3.5) cm

=10.25 cm

B)

Formula:

A = 1/2 . b .h [A=area ; b= base ; h= height]

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2 years ago

Anni [7]

Answer:A) 20,500

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Answer:

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Step-by-step explanation:

Supplementary angles add up to 180°

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3 years ago

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