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2 years ago

If, over a few weeks, Abraham saw 80 mayflies, how many flying insects did he see?

Mathematics

1 answer:

nydimaria [60]2 years ago

8 0

Answer:

two

Step-by-step explanation:

Often, all the mayflies in a population mature at once (a hatch), and for a day or two in the spring or autumn, mayflies are everywhere, dancing around each other in large groups, or resting on every available surface.

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The number of defective parts produced by a process in one day has a Poisson distribution with a mean of 10. Each defective part

hammer [34]

Answer:

9.48% probability that exactly 12 parts are produced in one day

Step-by-step explanation:

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

In which

x is the number of sucesses

e = 2.71828 is the Euler number

$\mu$ is the mean in the given interval.

The number of defective parts produced by a process in one day has a Poisson distribution with a mean of 10.

This means that $\mu = 10$

What is the probability that exactly 12 parts are produced in one day

This is P(X = 12).

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

$P(X = 12) = \frac{e^{-10}*(10)^{12}}{(12)!} = 0.0948$

9.48% probability that exactly 12 parts are produced in one day

6 0

3 years ago

tina is a waitress that makes $10.40, but an average 8 hour shift for her brings in an additional $85 in tips. how much does tin

allochka39001 [22]

Answer:

Tina makes per hours $=\$11.925$

Step-by-step explanation:

Tina makes $8$ hours $=\$10.40$

and additional tips $=\$85$

total amount makes for $8$ hours $= \$10.40+\$85$

total amount makes for $8$ hours $=\$95.40$

total amount makes for $1$ hours $=\frac{total\ amount}{total\ time}\\\\=\frac{\$95.40}{8}\\\\=\$11.925$

4 0

3 years ago

Help please .. im not good in math

olasank [31]

A ) acutely
B) obtuse

3 0

4 years ago

Pythagoras thereom ? help

Nutka1998 [239]

It looks like you have to do distance formula. It's basically this:

D = $\sqrt{(y_{2}-y{1})^{2} + (x_{2}-x{1})^{2} }$ (ignore the A, i dont know how to get rid of it sorry)

I would then plug in the points of A(1,7) and B(10,3).

D = $\sqrt{(7-3)^2 + (10-1)^2 }$

Then I would get the square root of 4^2 + 9^2

= square root of 16 + 81

= square root of 97

So the length of AB would be the square root of 97

4 0

4 years ago

Given the digits 2,5,7,9, 4, and 1, how many 4-digit codes can be made if 4 points

VMariaS [17]

Answer:

144

Step-by-step explanation:

first digit of the code: only 2 and 4 are the only even numbers availible, so only 2 possibilities for the first digit.

2nd digit of code: 2,5,7,9,1 so 6 possibilities for the 2nd digit.

3rd digit of code: 2,5,7,9,1 so 6 possibilities for the 3rd digit.

4th digit of code: only 7 and 9 are greater tyhan 6 so only 2 possibilities for the 4th digit.

SO...

2 x 6 x 6 x 2 = 144

8 0

3 years ago

If, over a few weeks, Abraham saw 80 mayflies, how many flying insects did he see?​

If, over a few weeks, Abraham saw 80 mayflies, how many flying insects did he see?