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worty [1.4K]
3 years ago
5

How do know how many protons are in a atom

Mathematics
2 answers:
katovenus [111]3 years ago
6 0
By the atom's atomic number in the periodic table.

ivann1987 [24]3 years ago
6 0
By the atomic number in the periodic table
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The trip is 870 miles, one way. How many miles do they travel there and back?
Natasha2012 [34]

Answer:

1740 miles

Step-by-step explanation:

They drive the way twice; once they go there and then they go home. Therefore, 870 times 2 equals 1740.

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3 years ago
Waf number us 20% of 40
NikAS [45]

Answer:. .

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20% of 40 is 8

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2 years ago
What is the perimeter of a regular pentagon with a
choli [55]

Answer:the perimeter of the regular pentagon is 5x + 20

Step-by-step explanation:

The perimeter of a plane figure is the distance around the plane figure. The pentagon is a plane figure. It has 5 sides. Since it is a regular Pentagon, it means that all the sides are equal.

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3 years ago
Please solve if you know no trolls please im desparate
IgorC [24]
The question isn’t equal to 90° it’s equal to 180° because the line is straight it’s not a right angle. so when u equal the whole equation to 180°, you get x=18.75. then plug in the number to find the degree of each.
so angle of department would be 139.25° and angle of gas station would be 40.75°
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3 years ago
Wot it's the missing number x9=6x3
vivado [14]
If i'm understanding this question correctly, i believe that it's 2. 
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3 years ago
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