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lisabon 2012 [21]

3 years ago

12

What is the place value of 8 in 0.829

2 answers:

VladimirAG [237]3 years ago

6 0

The 8 is in the tenths place, the 2 is in the hundredths place, and the 9 is in the thousandths place. Hope this helps, please mark brainliest Have a great night.

KengaRu [80]3 years ago

3 0

The answer is the tenths place

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If a 36-foot tree casts a 28-foot shadow at the same time near by building casts a 70-foot shadow, how tall is the building?

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Actual length / shadow ratio is equal
Let the height of the building be x, then
36/28 = x/70
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Therefore, the height of the building is 90 feet.

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Answer:

The answer is $\frac{3}{10\pi } cm/min$

Step-by-step explanation:

Assuming the snowball is a perfect sphere, then if A denotes the surface area and D the diameter then:

$A=4\pi r^{2} = 4\pi (\frac{D}{2} )^{2} =\pi D^{2}$

Differentiating wrt r we have:

$\frac{dA}{dD} =2\pi D$

We are told that $\frac{dA}{dt}= -6$ and we want to find $\frac{dD}{dt}$

By the chain rule we have:

$\frac{dA}{dD}=\frac{dA}{dt}.\frac{dt}{dD}=\frac{\frac{dA}{dt} }{\frac{dD}{dt} }$

∴ $2\pi D=-\frac{6}{\frac{dD}{dt} }$

∴ $\frac{dD}{dt}=-\frac{6}{2\pi D}$

When D=10 then

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The sign (-) shows that the D is decreasing.

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I buy a MP3 player for £40 in a sale where it was 20% off. What was the original price

natta225 [31]

20% off means you paid only 80% of the original price.
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x=40÷0.8=50
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To get this answer you would have to have a pace calculator!

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Answer:

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