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Anna71 [15]
3 years ago
8

I really need help ASAP and I only have 2 left of missing assignments on math and I am really bad at math and I am going to fail

help me plzzzzz T^T and continue
It's Homework #1: Odds: 9, 10 and 11

Mathematics
1 answer:
Reika [66]3 years ago
8 0

Answer:

28%

Step-by-step explanation:

2/7 = 0.28

0.28 = 28%

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Choose the correct simplification of the expression (2x7y)2(y5)3.
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Im taking this to mean (2 x^7 y)^2 (y^5)^3


= 4x^14 y^2 * y^15


= 4x^14 y^17 which is option 4

8 0
3 years ago
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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
It has been estimated that a student's final grade in a course decreases by 5 points for every 2 days absent from class. If a st
OverLord2011 [107]

Answer:

the final grade will decrease by 10 points

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3 years ago
Suppose that the waiting time for an elevator at a local shopping mall is uniformly distributed from 0 to 90 seconds.
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Answer:

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Step-by-step explanation:

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Answer:

Step-by-step explanation:

easy

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3 years ago
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