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dimaraw [331]
3 years ago
5

Find the surface area of the pyramid. The side lengths of the base are equal.

Mathematics
2 answers:
Firlakuza [10]3 years ago
8 0

Answer:

189.426

I used a calculator because the formula is complicated.

Sonja [21]3 years ago
3 0

Answer: 32.9 I think?

Step-by-step explanation:

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If 2.5 mol of dust particles were laid end to end along the equator, how many times would they encircle the planet? The circumfe
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Answer:

They encircle the planet 3.76\times 10^{11} times.

Step-by-step explanation:

Consider the provided information.

We have 2.5 mole of dust particles and the Avogadro's number is 6.022\times 10^{23}

Thus, the number of dust particles is:

2.5\times 6.022\times 10^{23}=15.055\times 10^{23}

Diameter of a dust particles is 10μm and the circumference of earth is 40,076 km.

Convert the measurement in meters.

Diameter: 10\mu m\times \frac{10^{-6}m}{\mu m} =10^{-5}m

If we line up the particles the distance they could cover is:

15.055\times 10^{23}\times 10^{-5}=15.055\times 10^{18}=1.5055\times 10^{19}

Circumference in meters:

40,076km\times \frac{1000m}{1km}=40,076,000 m

Therefore,

\frac{1.5055\times 10^{19}}{40,076,000} = 3.76\times 10^{11}

Hence, they encircle the planet 3.76\times 10^{11} times.

8 0
3 years ago
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