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Enrichment Activity Q4

Quiz by Michelle Villanueva

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Q 1/10
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During normal breathing, about 15% of the air in the lungs is replaced after one breath. Which is an exponential decay model for the amount of original air left in the lungs if the initial amount of air in the lungs is 600 mL.?
29
$y=600\left(1.85\right)^t$
$y=600\left(0.15\right)^t$
$y=600\left(0.85\right)^t$
$y=600\left(1.15\right)^t$

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10 questions

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Q1
During normal breathing, about 15% of the air in the lungs is replaced after one breath. Which is an exponential decay model for the amount of original air left in the lungs if the initial amount of air in the lungs is 600 mL.?
$y=600\left(1.85\right)^t$
$y=600\left(0.15\right)^t$
$y=600\left(0.85\right)^t$
$y=600\left(1.15\right)^t$
30s
Q2
30s
Q3
30s
Q4
Miguel graphed the locations of several places on his school playground in a coordinate plane. There is also a water fountain halfway between the carousel and seesaw. What are the polar coordinates of the water fountain?
$\left(0,\ 2\right)$
$\left(8,\ 2\right)$
$\left(26.57,\ 4.47\degree\right)$
$\left(4.47,\ 26.57\degree\right)$
30s
Q5
If we put 150,000 pesos in a savings account earning 5% simple interest per year, how much would the final amount be after 10 years? Which is the exponential model of the situation?
$y=150000\left(0.10\right)^5$
$y=150000\left(0.95\right)^{10}$
$y=150000\left(1.10\right)^5$
$y=150000\left(1.05\right)^{10}$
30s
Q6
30s
Q7
30s
Q8
30s
Q9
30s
Q10
30s

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