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REY [17]
3 years ago
11

Find the slope given (2,7) and (4,4)

Mathematics
1 answer:
8090 [49]3 years ago
8 0
<h3>Answer:</h3>

m= -3/2

<h3>Step by step:</h3>

m=y1-y2/x1-x2     = 4-7/4-2      = -3/2

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Answer:

120 grams will be left after 180 years.

Step-by-step explanation:

A radioactive half-life refers to the amount of time it takes for half of the original isotope to decay and its given by

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where,

N(t) = quantity of the substance remaining

N_0 = initial quantity of the substance

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t_{1/2} = half life of the substance

From the information given we know that:

  • The initial quantity is 480 g,
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And we want to find how much will be left. For this we use the above formula.

N(t)=480\left(\frac{1}{2}\right)^{\frac{180}{90}}\\\\N(t)=480\left(\frac{1}{2}\right)^2\\\\N(t)=480\cdot \frac{1}{2^2}=120

120 grams will be left after 180 years.

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Step-by-step explanation:

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