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serg [7]
3 years ago
7

4x-8=

="4x - 8 = -6x + 12" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
svet-max [94.6K]3 years ago
5 0
Simplify, simplify, simplify for problems like this. Add 6x to both sides to get 10x - 8 = 12. Then add 8 to both sides, so 10x = 20. Now divide by 10, and you get x = 2
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65-44.78>4

Step-by-step explanation

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Jordan surveyed her friends about whether or not they had a minivan and whether or not they lived in a two-story house. She repo
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Can you answer this please
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A 44<br> B 5<br> C 10<br> D None of the choices are correct.
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3 years ago
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a) \frac{dm}{dt} = -k\cdot m, b) m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }, c) m(t) = 10\cdot e^{-\frac{t}{2438.155} }, d) m(300) \approx 8.842\,g

Step-by-step explanation:

a) Let assume an initial mass m decaying at a constant rate k throughout time, the differential equation is:

\frac{dm}{dt} = -k\cdot m

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Where \tau is the time constant and k = \frac{1}{\tau}

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The particular solution of the differential equation is:

m(t) = 10\cdot e^{-\frac{t}{2438.155} }

d) The amount of radium after 300 years is:

m(300) \approx 8.842\,g

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