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kow [346]
2 years ago
7

marian is a sprinter, running short distances on the track team. she wants to find how fast she runs in miles per hour. what uni

ts should she start with?
Mathematics
1 answer:
Annette [7]2 years ago
6 0
Meters and seconds.

Most short distance races involve meters and the timing is usually in seconds. She can use the information and convert it to miles per hour.
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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
Natalka [10]

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
Jaya is the middle of three siblings whose ages are consecutive even integers. If the sum of their ages is 84,find Jaya’s age
Svetach [21]

12345612345612317890

7 0
1 year ago
Decompose 49 x 5 to<br> make it easier below<br> Explain
Andreyy89

Answer:

go by 5's

Step-by-step explanation:

5

5

5

5

and so on.

5 0
3 years ago
Read 2 more answers
K-1234=5678<br> what does k equal
artcher [175]

Answer:

k=6,912

Step-by-step explanation:

5678+1234=6912

5 0
3 years ago
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What is 3-2y+(-8y)+8.4 as a simplified expression
IRISSAK [1]

Answer:

-10y + 11.4

I hope this helps you out

7 0
2 years ago
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