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jekas [21]
3 years ago
7

Will give brainilest if correct Element X decays radioactively with a half life of 15 minutes. If there are 770 grams of Element

X, how long, to the nearest tenth of a minute, would it take the element to decay to 32 grams?
Mathematics
1 answer:
Archy [21]3 years ago
5 0

Answer:

The time it'd take for the element to have 15 g of mass is approximately 68 min.

Step-by-step explanation:

The radioactive decay of a substance is given by the following formula:

Since the element has a half life of 12 minutes, this means that after this time the mass of the element will be half of it was originally, therefore:

Therefore the mass of the element is given by:

If the initial mass is 760 g and the final mass is 15 g, we have:

The time it'd take for the element to have 15 g of mass is approximately 68 min.Step-by-step explanation:

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A)
D+Y=50
D=Y+10

b)
Y+10+Y=50
2Y+10=50
2Y=40
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Therefore there are 20 in yearbook and 30 in drama.

To check our work:
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4 0
3 years ago
Can you please help me :)
Llana [10]

Answer:

1) n = 24

2) m = 18

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4) m = 30

y = 3

m = 2

k = 45

x = 4

k = 80

Step-by-step explanation:

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3 years ago
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Answer:

Kindly check explanation

Step-by-step explanation:

Given that:

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Equation for scenario b

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The stacked bales of hay stacked to join the initial is. 1,316 bales

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3 years ago
Which number line plots the integers –12, –3, and 7? A number line going from negative 15 to positive 10. Points are at negative
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Answer:

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Step-by-step explanation:

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Answer:

60

Step-by-step explanation:

Evaluate 7p + 6(p ÷ q)^2 - 2q (if p = 6 and q = 3)

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Hope this helps!

4 0
3 years ago
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