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Goshia [24]
3 years ago
7

3 is added to five times number, and the result is multiplied by 4. the final result is 72. what is the number​

Mathematics
2 answers:
Dima020 [189]3 years ago
7 0

Answer:

The number is 3

Step-by-step explanation:

Hi,

4 ( 3 + 5x) = 72

12 + 20x = 72

20x = 60

x = 3

Hope this helps :)

Monica [59]3 years ago
4 0
The answer is 3.... hope i helped
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Recall that m(t) = (1/2)^t/h for radioactive decay, where h is the half-life. Suppose that a 500g sample of phosphorus-32 decays
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The question is incomplete, here is the complete question:

Recall that m(t) = m.(1/2)^t/h for radioactive decay, where h is the half-life. Suppose that a 500 g sample of phosphorus-32 decays to 356 g over 7 days. Calculate the half life of the sample.

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<u>Step-by-step explanation:</u>

The equation used to calculate the half life of the sample is given as:

m(t)=m_o(1/2)^{t/h}

where,

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Putting values in above equation, we get:

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Hence, the half life of the sample of phosphorus-32 is 14.28days^{-1}

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