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3 years ago

Maria bought a hat for $45.she had to sell them at a loss of 5%.find the selling price of the hat?

Mathematics

1 answer:

BigorU [14]3 years ago

7 0

£42.75
find 5% and deduct it from there.
hope this helps x

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3 years ago

A string passing over a smooth pulley carries a stone at one end. While its other end is attached to a vibrating tuning fork and

nasty-shy [4]

Answer:

correct option is C) 2.8

Step-by-step explanation:

given data

string vibrates form = 8 loops

in water loop formed = 10 loops

solution

we consider mass of stone = m

string length = l

frequency of tuning = f

volume = v

density of stone = $\rho$

case (1)

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so here

$l = \frac{8 \lambda _1}{2}$ ..............1

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here tension = mg

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and

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when 8 loop form with 2 adjacent node is $\frac{\lambda }{2}$

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$l = 5 \lambda_1\\\\\lambda_1 = \frac{l}{5}$

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and

T = v × $\rho$ - v × $\rho$ × g

from equation 2

f × $\lambda_2$ = f × $\frac{1}{5}$

$\sqrt{\frac{v\rho _{stone} g - v\rho _{water} g}{\mu}} = f \times \frac{1}{5}$ .......................5

now we divide eq 5 by the eq 3

$\sqrt{\frac{vg (\rho _{stone} - \rho _{water})}{\mu vg \times \rho _{stone}}} = \frac{fl}{5} \times \frac{4}{fl}$

solve irt we get

$1 - \frac{\rho _{stone}}{\rho _{water}} = \frac{16}{25}$

relative density $\frac{\rho _{stone}}{\rho _{water}} = \frac{25}{9}$

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3 years ago

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shtirl [24]

Well not sure what you are asking, but If it is what I think it is, it would go like this:
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Then the answer should be

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If you mean this...

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Hope I helped! (Be sure to thank me!)

7 0

3 years ago

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