3 years ago

11. A wave has a wavelength of 125 meters is moving at a speed of 20 m's. What is its frequency?

Mathematics

1 answer:

olga_2 [115]3 years ago

3 0

Answer:

.16hertz

Step-by-step explanation:

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2/25 *5 as a fraction

bulgar [2K]

For this case we must rewrite the following expression as a fraction:

$\frac {2}{25} * 5$

So, we have:

$\frac{2*5}{25} =\\\frac{10}{25} =$

We divide numerator and denominator by 5:

$\frac {2} {5}$

Thus, the simplified expression is:

$\frac{2} {5}$

Answer:

$\frac {2} {5}$

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Find the unit vector that has the same direction as the vector v. v = 3i + j

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$\bf \textit{unit vector for \underline{v}}\qquad v=\ \textless \ a,b\ \textgreater \ \implies \stackrel{unit~vector}{\cfrac{a}{\sqrt{a^2+b^2}}~,~\cfrac{b}{\sqrt{a^2+b^2}}}\\\\
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v=3i+j\implies v=\ \textless \ 3,1\ \textgreater \ \implies \stackrel{unit~vector}{\cfrac{3}{\sqrt{3^2+1^2}}~,~\cfrac{1}{\sqrt{3^2+1^2}}}
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Step-by-step explanation:

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2 years ago

The volume of a cylinder is 320 pi cm cubed. The radius of the base of the cylinder is 4 cm. What is the height of the cylinder?

Dmitrij [34]

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h = 20 cm

Step-by-step explanation:

π4²h = 320π

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3 years ago

A student takes an exam containing 16 true or false questions. If the student guesses, what is the probability that he will get

almond37 [142]

Answer:

0.001831055

Step-by-step explanation:

Here, n = 16, p = 0.5, (1 - p) = 0.5 and x = 14

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We need to calculate P(X = 14)

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