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vovikov84 [41]
3 years ago
13

Can anyone please help? Greatly appreciated!

Mathematics
1 answer:
Ket [755]3 years ago
5 0
You will need about 3 4ths
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The density of lead is 11.4g/cm^3 at 25 degrees C. Calculate the volume occupied by 25.0g of lead
ElenaW [278]

Answer:

2.193 cm³

Step-by-step explanation:

density is mass divided by volume:

density =  \frac{mass}{volume}

you can manipulate the formula by multiplying with volume:

density \times volume = mass

then dividing by density:

volume =  \frac{mass}{density}

in this case:

volume =  \frac{25g}{11.4 \frac{g}{cm}  }  = 2.193 { \: cm}^{3}

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4 years ago
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2 years ago
What is the quotient
tester [92]

Answer:

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Step-by-step explanation:

Using synthetic division

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Bringing down the 4 and multiplying

-5        4      25   12

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    ----------------------

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How do I factor the following expression?
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\bf x^6-9x^4-81x^2+729\implies \stackrel{\textit{let's do some grouping}}{(x^6-9x^4)-(81x^2-729)} \\\\\\ \stackrel{\textit{some common factoring}}{x^4\boxed{(x^2-9)}-81\boxed{(x^2-9)}}\implies \stackrel{\textit{common factoring}}{\boxed{(x^2-9)}(x^4-81)} \\\\\\ \stackrel{\textit{difference of squares}}{[x^2-3^2][(x^2)^2-(3^2)^2]}\implies (x-3)(x+3)\stackrel{\textit{difference of squares}}{(x^2-3^2)}(x^2+3^2) \\\\\\ (x-3)(x+3)~(x-3)(x+3)~(x^2+9)

6 0
3 years ago
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