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docker41 [41]
3 years ago
12

If one half life is the amount of time it takes for a radio active isotope to decay by a factor of 2, approximately which percen

t describes how much of the initial quantity of a substance would remain after 2-3 half lives?
A.0.25
B.0.20
C.0.75
D.0.50
Mathematics
1 answer:
ycow [4]3 years ago
3 0

Answer:

the answer for this question is option c

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Solve<br> x2 - 8x + 14 = 2x - 7
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Answer:

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Step-by-step explanation:

             x^{2} -8x+14=2x-7

x^{2} -8x-2x+14+7=0

            x^{2} -10x+21=0

\mathrm{For\:a\:quadratic\:equation\:of\:the\:form\:}ax^2+bx+c=0\mathrm{\:the\:solutions\:are\:}

x= \frac{-b\pm \sqrt{b^2-4ac}}{2a}

positive

x=\frac{-\left(-10\right)+\sqrt{\left(-10\right)^2-4\cdot \:1\cdot \:21}}{2\cdot \:1}

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negative

x=\frac{-\left(-10\right)-\sqrt{\left(-10\right)^2-4\cdot \:1\cdot \:21}}{2\cdot \:1}

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3 years ago
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Pls look at the photo and help me! ASAP! Luv you guys &lt;3
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880,000 is the answer
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