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3 years ago

Write each statement as a proportion using colons. 4 is to 20 as 2 is to 10.

Mathematics

1 answer:

prisoha [69]3 years ago

3 0

4:20 as 2:10

Or if you were to simplify it :

1:5

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I would have 360000.

Step-by-step explanation:

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Convert 175% to a fraction.<br> i did this 3 times and i keep getting it wrong :(

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3 years ago

A line passes through the points (2,18) and (8,24). Write a linear function rule in terms of x and y for this line. The linear f

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3 years ago

A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 48.0 and 58.

Yanka [14]

Answer: 0.025

Step-by-step explanation:

Given : A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between the interval [48.0 minutes, 58.0 minutes].

The probability density function :-

$f(x)=\dfrac{1}{58-48}=\dfrac{1}{10}$

Now, the probability that a given class period runs between 50.25 and 50.5 minutes is given by :-

$\int^{50.5}_{50.25}\ f(x)\ dx\\\\=\int^{50.5}_{50.25}\ \dfrac{1}{10}\ dx\\\\=\dfrac{1}{10}|x|^{50.5}_{50.25}\\\\=\dfrac{1}{10}\ [50.5-50.25]=\dfrac{1}{10}\times(0.25)=0.025$

Hence, the probability that a given class period runs between 50.25 and 50.5 minutes =0.025

Similarly , the probability of selecting a class that runs between 50.25 and 50.5 minutes = 0.025

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3 years ago