8x+4y=-3y
32+2y=7x-42

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Ответ:

Jimm6500

10.06.2021

Mathematics

The answer is b. 41.25 lb.

To calculate this, we will use Galileo's square cube law, used to describe the change of the area or the volume of the shape, when their dimensions increase or decrease. The formula used for change of the volume is
$V_2=V_1( \frac{l_2}{l_1} )^{3}$

V₂ - the volume after the change,
V₁ - the volume before the change,
l₂ - the dimension after the change,
l₁ - the dimension before the change.

We have:
V₂ = ?
V₁ = 0.33 lb
Since each dimension is 5 times as large, then $\frac{l_2}{l_1} =5$

Therefore:
$V_2=0.33*(5)^{3} \\ 
V_2=0.33*125 \\ 
V_2=41.25$

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8x+4y=-3y 32+2y=7x-42