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Ket [755]
3 years ago
8

An airplane flies 810 km in 1.5 hours. how far will the plane fly in 2.2 hours if it maintains the same air speed?

Mathematics
1 answer:
sergey [27]3 years ago
4 0
We can use a ratio here:
810 : 1.5
x : 2.2

Cross multiplying:
810 x 2.2 = 1.5x
x = 1,188 kilometers

The plane will fly 1,188 km if 2.2 hours if it maintains the same speed.
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A population has a mean muequals160 and a standard deviation sigmaequals20. Find the mean and standard deviation of the sampling
hoa [83]

Answer:

Mean 160

Standard deviation 2.63

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, the sample means with size n of at least 30 can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

In this problem, we have that:

\mu = 160, \sigma = 20

Find the mean and standard deviation of the sampling distribution of sample means with sample size n = 58.

Mean 160

Standard deviation s = \frac{20}{\sqrt{58}} = 2.63

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4 years ago
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juin [17]

Answer:

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Step-by-step explanation:

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8 0
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Explain why you do not have to do any computing to solve 15 by 0 by (13+7)
NARA [144]
We dont have to do any cmputing, because multiplying by 0 is always 0. Its mean that no matter what are the different numbers, if we multiply it by 0, we get 0

The result is 0
6 0
4 years ago
Determine the equation of a line that is perpendicular to 4y = -3x + 20 and passes through the point (-3, -2)
bezimeni [28]

Change into slope-intercept form:

y= -3/4x + 5

We will be using the point slope formula to write the perpendicular equation:

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Answer:

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3 0
3 years ago
What is the answer to 16=d+3
Vlada [557]

Hello !!

\rule{300}{5}

\huge\blue{\mid{\fbox{\tt{ANSWER:-\:}}\mid}}

d = 13

<h2><em>EXPLANATION :</em></h2><h2><em /></h2>

Switch sides:

16 = d~+~3

Subtract 3 from both sides:

d~+~3 ~-~3=16 ~-~3

Simplify:

d = 13

\huge\blue{\mid{\fbox{\tt{ANSWER:-\:}}\mid}}

d = 13

Hope It Helps. . .

#LearnWithBrainly

A~n~s~w~e~r~:

Jace ^-^

7 0
3 years ago
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