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Rasek [7]
3 years ago
15

Hey guys i need help plz will give brainlist

Mathematics
1 answer:
nadya68 [22]3 years ago
5 0

Step-by-step explanation:

Effective resistance in the 30Ω and 40Ω parallel circuit = 1 / (1/30 + 1/40) = 120/7 Ω.

20Ω + 10Ω = 30Ω

Effective resistance in the 50Ω and (20Ω + 10Ω) parallel circuit = 1 / (1/50 + 1/30) = 75/4 Ω.

Now we can add the resistances up:

Effective resistance for circuit

= 120/7 Ω + 75/4 Ω = 1005/28 Ω.

Hence I = V / R

= 9.0V / (1005/28 Ω) = 0.25A. (2s.f.)

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Katyanochek1 [597]

Step-by-step explanation:

{2.71 \times 10}^{ - 3}

This can be rewritten as

2.71 \times  \frac{1}{10^{3} }

If we will solve this way,

\frac{2.71}{1000}  = 0.00271

But since the denominator is just in terms of 1, we can just simply get the (-3). Note that we have to take the negative into consideration.

From the original position of the decimal point, move the decimal point 3 times TO THE LEFT. Therefore, from 2.71 we move the decimal point 3 times to the left, 0.00271.

If the exponent has a positive value, move TO THE RIGHT.

For example,

2.71 \times  {10}^{3}  = 2.71 \times 1000 \\  = 2710

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ICE Princess25 [194]

Answer:

The correct option is A.

Step-by-step explanation:

The given number is

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Where 5 is dividend and 11 is divisor.

Since dividend is less than divisor we add a decimal place and the first zero. Notice the decimal point which has appeared on the answer line and by the dividend. It does not appear anywhere else.

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Now the new dividend is 60. Divide the number by divisor.

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\frac{5}{11}\approx 0.45

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4 years ago
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Answer:

Step-by-step explanation:

whaaaaaaaaaaaat??? hi by the way

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