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Marianna [84]
4 years ago
6

What is the sum?

Mathematics
2 answers:
Nezavi [6.7K]4 years ago
4 0

Answer:

Its B on e2020

Step-by-step explanation:

correct on quiz

Klio2033 [76]4 years ago
3 0

Answer:

A on edge

Step-by-step explanation:

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5x-3y-z<br> If x= -2, y=2 and z= -3
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Plug in the numerical values given for each variable.
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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.

<u>Answer:</u> The half life of the sample of phosphorus-32 is 14.28days^{-1}

<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,

m(t) =  amount of sample after time 't' = 356 g

m_o = initial amount of the sample = 500 g

t = time period = 7 days

h = half life of the sample = ?

Putting values in above equation, we get:

356=500\times (\frac{1}{2})^{7/h}\\\\h=14.28days^{-1}

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

7 0
4 years ago
Francis bought a new dress that was discounted by 25%. She used the following expression to find the price of the dress after th
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