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scoundrel [369]
2 years ago
6

An element with mass 310 grams decays by 8. 9% per minute. How much of the element is remaining after 19 minutes, to the nearest

10th of a gram?.
Mathematics
1 answer:
Cerrena [4.2K]2 years ago
3 0

\qquad \textit{Amount for Exponential Decay} \\\\ A=P(1 - r)^t\qquad \begin{cases} A=\textit{current amount}\\ P=\textit{initial amount}\dotfill &310\\ r=rate\to 8.9\%\to \frac{8.9}{100}\dotfill &0.089\\ t=\textit{elapsed time}\dotfill &19\\ \end{cases} \\\\\\ A=310(1-0.089)^{19}\implies A=310(0.911)^{19}\implies A\approx 52.8

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4+6 = 10>11 so 4 isnt the answer
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3 years ago
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Please help me with number 7
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12 - 2x  =  8(x + 4)

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7 0
2 years ago
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Interior angles on parallel lines cut by a traversal are supplementary (they add up to 180°). These can be identified as "c" angles, due to their shape. Knowing this, we can figure out the value of x:
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3 years ago
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