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3 years ago

6

Lead metal can be extracted from a mineral called galena, which contains 86.6% lead by mass. A particular ore contains 68.5% gal

ena by mass. If the lead can be extracted with 92.5 % efficiency, what mass of ore is required to make a lead sphere with a
6.50cm radius?

1 answer:

r-ruslan [8.4K]3 years ago

6 0

Answer:

ds hj bfsj gjhbyuabfdbsybfy

Step-by-step explanation:

sdbhabjbgfybsbfsad gfhysabfubdfr

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Evaluate the expression 3(x - 1)' + 2x - 7 for = 3,

Marizza181 [45]

Answer and step-by-step explanation:

Break the bracket out would be the first step to evaluate this expression:

3(x-1)

= 3x - 3

Hope this helped :3

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3 years ago

Nicole’s friend runs 3/8 of a mile, but her distance is only 3/5 of Nicole’s distance. How far does Nicole run?

salantis [7]

Step-by-step explanation:

<h3><u>Required Answer</u><u>:</u><u>-</u></h3>

Let distance travelled by Nichol =x

<h2>ATQ</h2>

${:}\longrightarrow$ $\sf {\dfrac {3}{5}}\times x={\dfrac {3}{8}}$

${:}\longrightarrow$ $\sf {\dfrac {3x}{5}}={\dfrac {3}{8}}$

${:}\longrightarrow$ $\sf 8 (3x)=5×3$

${:}\longrightarrow$ $\sf 24x=15$

${:}\longrightarrow$ $\sf x={\dfrac{24}{15}}$

${:}\longrightarrow$ $\sf x=1.6$

$\therefore$ Nichol runs 1.6miles .

4 0

3 years ago

Whats is the diference of:

grandymaker [24]

Answer:

$2h^2$

Step-by-step explanation:

=> $(10h^4+h^2)-(10h^4-h^2)$

=> $10h^4+h^2-10h^4+h^2$

=> $h^2+h^2$

=> $2h^2$

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3 years ago

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zlopas [31]

Answer:

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Step-by-step explanation:

Is the quadratic formula allowed or no?

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mihalych1998 [28]

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3 years ago