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Liono4ka [1.6K]
3 years ago
10

The school store opened on the first day of school with 35 notebooks and 15 pencils. Within 2 days it sold all of those items. O

n the first day, twice as many notebooks were sold as pencils. On the second day, for every 5 notebooks sold, 2 pencils were sold. How many notebooks and how many pencils were sold on each day
Mathematics
2 answers:
frozen [14]3 years ago
5 0
On the first day, there were ten notebooks sold and five pencils sold. On the second day, there were 25 notebooks sold and 10 pencils sold.
Igoryamba3 years ago
5 0
The first day its 10 notebooks and 5 pencils. The second day its 25 notebooks and 15 pencils.
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Answer:

t = \frac{ln(\frac{21}{59})}{-0.15}=6.887 hr

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Step-by-step explanation:

For this case we have the following differential equationÑ

\frac{du}{dt}= -k (u-T)

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\frac{du}{u-T} = -k dt

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IF we integrate both sides we got:

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We can also express the solution in the following terms:

u(t) = (T_i -T_{amb}) e^{kt} +T_{amb}

For this case we know that k =-0.15 hr since w ehave a cooloing, T_{i}= 70 F, T_{amb}=11F, we have this model:

u(t) = (70-11) e^{-0.15t} +11

And if we want that the temperature would be 32F we can solve for t like this:

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If we apply natural logs on both sides we got:

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7 0
3 years ago
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NikAS [45]

Answer:

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Step-by-step explanation:

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Hence, the number of vegetables did farmer bring in the market is 1764 vegetables

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