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LenaWriter [7]
2 years ago
10

Question 3 of 11 Solve 2x - 3/4= 7 1/4

Mathematics
1 answer:
valentina_108 [34]2 years ago
8 0

Answer: x = 4

Step-by-step explanation: multiply both sides of the equation by 4. multiply 7 and 4 to get 28. add 28 and 1 to get 29. add 3 to both sides and add 29 and 3 to get 32. divide both sides by 8 then divide 32 by 8 to get 4.

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Plutonium-240 decays according to the function L where o
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Answer:

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Step-by-step explanation:

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Data:

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Calculation:

\ln \dfrac{24}{20} =0.000 11t\\\\\ln 1.2 = 0.000 11t\\\\0.1823 = 0.000 11t\\\\t = \dfrac{0.1823}{0.000 11} = \textbf{1700 yr}\\\\\text{It will take } \boxed{\textbf{1700 yr}}\text{ for the polonium to decay to 20 g}

8 0
3 years ago
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sveticcg [70]
S=40+20+10+\cdots+0.078125
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2^{-1}S=40\left(2^{-1}+2^{-2}+2^{-3}+\cdots+2^{-10}\right)

\implies S-2^{-1}S=40\left(1-2^{-10}\right)
\implies\dfrac12S=40\left(1-\dfrac1{1024}\right)
\implies S=80\left(1-\dfrac1{1024}\right)=\dfrac{5115}{64}=79.921875
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Step-by-step explanation:

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