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3 years ago

What is 2.6 repeating as a fraction

Mathematics

1 answer:

Elanso [62]3 years ago

3 0

2.6 repeating as a fraction would be 2 2/3

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A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. He wants to construct the 95

Galina-37 [17]

Answer:

The minimum sample size required for the estimate is 345.

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:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

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

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

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.

The standard deviation is known to be 1.8.

This means that $\sigma = 1.8$

What is the minimum sample size required for the estimate?

This is n for which M = 0.19. So

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

$0.19 = 1.96\frac{1.8}{\sqrt{n}}$

$0.19\sqrt{n} = 1.96*1.8$

$\sqrt{n} = \frac{1.96*1.8}{0.19}$

$(\sqrt{n})^2 = (\frac{1.96*1.8}{0.19})^2$

$n = 344.8$

Rounding up to the next integer:

The minimum sample size required for the estimate is 345.

8 0

3 years ago

PLEASE HELP IM STUCK PLS

eduard

Answer: (8,0) and (0,-4)

Step-by-step explanation:

The x-intercept of an equation is when the equation touches the x-axis which is also where y = 0

So the x coordinate of the x-intercept is -2x + 0 = -16 as y = 0

x = 8 so the x-intercept is (8,0)

The y-intercept of an equation is when the equation touches the y-axis which is also where x = 0

So the y coordinate of the y-intercept is 0 + 4y = -16 as x = 0

y = -4 so the y intercept is (0,-4)

8 0

2 years ago

Read 2 more answers

For a sphere with a radius of 8, what is the surface area

stepan [7]

Answer:

Step-by-step explanation:

4 0

4 years ago

Two boats are traveling toward a cliff that is 225 feet above sea level. When the two boats are exactly 200 feet apart, the boat

timofeeve [1]

Answer:

$x=23.82^o$

Step-by-step explanation:

$Solve ~for~x, first ~ we~ need ~ to ~know~y$

$tan~36=\frac{225}{y}$

$y=\frac{225}{tan ~36}$

$y=309.6859321$

$tan(x)=\frac{225}{y+200}$

$x=tan^{-1}(\frac{225}{309.6858321}$

$x=23.81898048$

$x=23.82^o$

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hope it helps...

have a great day!!

7 0

3 years ago

Which point is not on the graph of the function y = x + 5?

Blizzard [7]

(10,5)

Explanation:
By replacing the value of x with the x co-ordinate of the point above, we get that;
y=10+5
y=15
This does not tally with (10,5)

6 0

4 years ago