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3 years ago

What's the middle number between 20 and 30?

Mathematics

2 answers:

tensa zangetsu [6.8K]3 years ago

8 0

$\huge\text{Hey there!}$

$\huge\textsf{What's the middle number between 20 \& 30?}$

$\mathsf{\dfrac{20+30}{2}}$

$\large\textsf{20 + 30 = \bf 50}$

$\mathsf{=\dfrac{ 50}{2}}$

$\large\textsf{= \bf 25}$

$\boxed{\boxed{\huge\textsf{Answer: middle number between 20 \& 30 is: \bf 25}}}\\\huge\checkmark$

$\large\text{Good luck on your assignment and enjoy your day!}$

~ $\frak{Amphitrite1040:)}$

slavikrds [6]3 years ago

3 0

Answer:

Step-by-step explanation:

you can find the middle number by solving for the mean/average

20+30=50

50/2=25

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3 years ago

If f(x) = 6x - 4 and g(x) = 2x^3, find g(3) - f(4)

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To solve the problem, simply plug in the value for x in both functions, as shown below:

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4 years ago

Read 2 more answers

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2 years ago

Suppose that the distribution is bell-shaped. If approximately 99.7% of the lifetimes lie between 568 hours and 1066 hours, then

irakobra [83]

Answer:

$\sigma =\frac{478}{6}=79.667$

Step-by-step explanation:

The empirical rule, also referred to as "the three-sigma rule or 68-95-99.7 rule, is a statistical rule which states that for a normal distribution, almost all data falls within three standard deviations (denoted by σ) of the mean (denoted by µ)". The empirical rule shows that 68% falls within the first standard deviation (µ ± σ), 95% within the first two standard deviations (µ ± 2σ), and 99.7% within the first three standard deviations (µ ± 3σ).

And on this case since we are within 3 deviations (because we have 99.7% of the data between 568 and 1066hours), the result obtained using the z score agrees with the empirical rule.

So on this case we can find the standard deviation on this ways:

$\mu -3\sigma = 568$ (1)