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storchak [24]
3 years ago
7

will mark brainles if answered fast There are 72 items on Ginny bookshelf 1/3 of items are hardcover books. 4/9 of the items are

softcover books The many DVDs are on Ginny's shelf?
Mathematics
1 answer:
Feliz [49]3 years ago
3 0
I think it’s 16 because 1/3=3/9 of hardcover books
3/9+4/9=7/9
2/9 is DVDS
72/9=8
8x2=16
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When a bactericide is added to a nutrient broth in which bacteria are​ growing, the bacteria population continues to grow for a​
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Answer:

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b) 0 bacteria per hour

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Step-by-step explanation:

We are given the following information in the question:

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b(t) = 9^6 + 6^4t-6^3t^2

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Thus, the growth rate is given by:

\displaystyle\frac{db(t)}{dt} = \frac{d}{dt}(9^6 + 6^4t-6^3t^2)\\\\= 6^4-2(6^3)t

a) Growth rates at t = 0 hours

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b) Growth rates at t = 3 hours

\displaystyle\frac{db(t)}{dt} \bigg|_{t=3}= 6^4-2(6^3)(3) = 0\text{ bacteria per hour}

c) Growth rates at t = 6 hours

\displaystyle\frac{db(t)}{dt} \bigg|_{t=6}= 6^4-2(6^3)(6) = -1296\text{ bacteria per hour}

3 0
3 years ago
3 lines are shown. A line with points T, R, W intersects a line with points V, R, S at point R. A line extends from point R to p
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Step-by-step explanation:

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Brainliest + 60 points
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It’s the last option

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2 years ago
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