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zaharov [31]
3 years ago
7

A certain type of cell doubles every 7 hours. If you started with 14 cells, how many would you have after 21 hours? (gridded

Mathematics
1 answer:
alexandr1967 [171]3 years ago
4 0

Answer:

4802

Step-by-step explanation:

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A flagpole casts a shadow 16.60 meters long Tim stands at a distance of 12.45 meters from the base of the flagpole such that the
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b)

Step-by-step explanation:

a) 4+12>8

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NO

b) 5+12>10

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YES

c) 16+4>6

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3 years ago
The state highway department is studying traffic patterns on one of the busiest highways in the state. As part of the study, the
larisa86 [58]

Answer:

The need to sample 76 days.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.99}{2} = 0.005

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.005 = 0.995, so z = 2.575

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

How many days do they need to sample

We need to sample n days.

n is found when M = 300.

We have that \sigma = 1010

So

M = z*\frac{\sigma}{\sqrt{n}}

300 = 2.575*\frac{1010}{\sqrt{n}}

300\sqrt{n} = 2.575*1010

\sqrt{n} = \frac{2.575*1010}{300}

(\sqrt{n})^{2} = (\frac{2.575*1010}{300})^{2}

n = 75.1

Rounding up

The need to sample 76 days.

3 0
3 years ago
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