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2 years ago

Suppose that a 2 by 10 rectangular grid of seats is filled with people. On the

1 answer:

4 0

There are 20! number of ways for everyone to do this so that at the end of the move, each seat is taken by exactly one person.

People are seated in a 2 by 10 rectangle grid. All 20 persons stand up from their seats and relocate to an orthogonally neighboring one upon the blowing of a whistle.

Now, we have to find the number of possible ways in which each seat is taken up by exactly one person after the move.

As the number of people is 20 and 20 seats are to filled exactly once.

So, the number of ways = 20!

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X -12 = 14 ---------------

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$x - 12 = 14 \\ x = 14 + 12 \\ x = 26$

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3 years ago

-2x^2-20x-46 How would you solve this?

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-2x^2-20x-46

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-2(x^2)-20x-46

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3 years ago

Two capacitors, a 20 mF and a 30 mF, are connected in parallel to a 400 Hz source. The total capacitive reactance is _____.

muminat

Answer-

The total capacitive reactance of the circuit is 7.96 Ω.

Solution-

Two capacitors, a 20 mF and a 30 mF, are connected in parallel to a 400 Hz source.

The effective/equivalent capacitance of the circuit is,

$C=20+30=50\ mF$

As, when capacitors are connected together in parallel, the equivalent capacitance in the circuit is equal to the sum of capacitance of all the individual capacitor.

We know that,

$X_c=\dfrac{1}{2\pi fC}$