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Tpy6a [65]
2 years ago
5

The power 9^2 is equivalent to 81. What is the value of 9^-2?

Mathematics
2 answers:
goldfiish [28.3K]2 years ago
8 0
Since it’s a negative exponent you have to use the reciprocal, so this would be 1/9^2. remember you have to apply the exponent to both the 1 and 9. since 1^2 is equal to one still the answer would just be 1/81, or 0.012345679
lidiya [134]2 years ago
5 0

Answer:

0.01234567901

Step-by-step explanation:

pls make me brainliest

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Answer:

The dimension of this rectangle = 2mm by 21mm

Where 2 mm = Width of the rectangle

21 mm = Length of the rectangle.

Step-by-step explanation:

The formula for the perimeter of a rectangle = 2(L + W)

= 2L + 2W

The perimeter = 46 mm

L = 3x + 3

W = x - 4

P = 2L + 2W

46mm = 2(3x + 3) + 2(x - 4)

46 = 6x + 6 + 2x - 8

Collect like terms

46 +8 -6 = 6x + 2x

48 = 8x

x = 48/8

x = 6

Since the Length = 3x + 3

= 3(6) + 3

= 18 + 3

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Since the Width = x - 4

= 6 - 4

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Therefore, the dimension of this rectangle = 2mm by 21mm

Where 2 mm = Width of the rectangle

21 mm = Length of the rectangle.

8 0
3 years ago
The total current of a parallel circuit is 9+j2 amps and the current of one component of the circuit is 3−j5 amps. What is the c
stealth61 [152]

Apply law of total resistance in parallel circuit

\\ \tt\hookrightarrow \dfrac{1}{R}=\dfrac{1}{R_1}+\dfrac{1}{R_2}

\\ \tt\hookrightarrow \dfrac{1}{9+2J}=\dfrac{1}{3-5j}+\dfrac{1}{R_2}

\\ \tt\hookrightarrow \dfrac{1}{R_2}=\dfrac{1}{9+2J}-\dfrac{1}{3-5J}

\\ \tt\hookrightarrow \dfrac{1}{R_2}=\dfrac{3-5J-9-2J}{(9+2J)(3-5J)}

\\ \tt\hookrightarrow R_2=\dfrac{(9+2J)(3-5J)}{-6-7J}

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Answer:

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Step-by-step explanation:

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marin [14]

Answer:

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Step-by-step explanation:

3/8 ÷ 1/4

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5 0
2 years ago
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