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kolbaska11 [484]
3 years ago
13

Bacteria in a dirty glass triple every year. If there are 25 bacteria to start, how many are in the glass after 8 hours?

Mathematics
2 answers:
Semmy [17]3 years ago
7 0

Answer

1,092

Step-by-step explanation:

zheka24 [161]3 years ago
7 0
49 because 25/8 is 3.125 rounded is 3 then 3 time 8 is 24 then 24+25 is 49
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Which equation represents the equation of the parabola with focus (-3 3) and directrix y=7?
Artemon [7]

Answer:

The equation y=\frac{-x^2-6x+31}{8} represents the equation of the parabola with focus (-3, 3) and directrix y = 7.

Step-by-step explanation:

To find the equation of the parabola with focus (-3, 3) and directrix y = 7. We start by assuming a general point on the parabola (x, y).

Using the distance formula d = \sqrt {\left( {x_1 - x_2 } \right)^2 + \left( {y_1 - y_2 } \right)^2 }, we find that the distance between (x, y) is

\sqrt{(x+3)^2+(y-3)^2}

and the distance between (x, y) and the directrix y = 7 is

\sqrt{(y-7)^2}.

On the parabola, these distances are equal so, we solve for y:

\sqrt{(x+3)^2+(y-3)^2}=\sqrt{(y-7)^2}\\\\\left(\sqrt{\left(x+3\right)^2+\left(y-3\right)^2}\right)^2=\left(\sqrt{\left(y-7\right)^2}\right)^2\\\\x^2+6x+y^2+18-6y=\left(y-7\right)^2\\\\x^2+6x+y^2+18-6y=y^2-14y+49\\\\y=\frac{-x^2-6x+31}{8}

6 0
3 years ago
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GrogVix [38]

Answer:

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Step-by-step explanation:

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6 0
3 years ago
Kaley cuts half of a loaf of bread into 4 equal parts. What fraction of the whole loaf does each of the 4 parts represent?
morpeh [17]

Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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0-3/3-0

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-1

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y = -x + 3

Best of Luck!

5 0
3 years ago
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25:1 is the answer.

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