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2 years ago

Please help!! I don’t know how to solve this. Which one is the digit of the units in 3^81:

Mathematics

1 answer:

egoroff_w [7]2 years ago

3 0

<u>Solution:</u>

3⁸¹ = 3⁹ ⁺ ⁹ ⁺ ⁹ ⁺ ⁹ ⁺ ⁹ ⁺ ⁹ ⁺ ⁹ ⁺ ⁹ ⁺ ⁹ ⁺ ⁹
3⁸¹ = 3⁹ x 3⁹ x 3⁹ x 3⁹ x 3⁹ x 3⁹ x 3⁹ x 3⁹ x 3⁹
3⁹ = 19683 <u>[Using Calculator]</u>

This means that the Unit digit of 19683 is 3. For each number, multiply the unit's digit of 3⁹.

3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3
=> 19683
=> <u>Unit digit of 3⁸¹ = 3</u>

Option A is correct.

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Tpy6a [65]

Answer:

22 3/4 ft

Step-by-step explanation:

The diagram seems to show a 6 1/2 ft person casting a 9 ft shadow at the same time a flagpole is casting a 31 1/2 ft shadow. You want the height of the flagpole.

<h3>Proportion</h3>

Shadow lengths are presumed proportional to the height of the object making them. This means ...

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Multiplying by 31 1/2, we get ...

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1 year ago

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uysha [10]

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Step-by-step explanation:

The form of the point-slope equation is $y-y_{1}=m(x-x_{1})$ , where

m is the lope of the line
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$(x_{1},y_{1})$ and $(x_{2},y_{2})$ are two points on the line

∵ The line through (2 , 3) and (7 , 4)

∴ $x_{1}$ = 2 and $x_{2}$ = 7

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- Substitute these value in the rule of the slope

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Let us substitute the value of the slope and the coordinates of point $(x_{1},y_{1})$ in the form of the equation

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∴ $y-3=\frac{1}{5}(x-2)$

The point-slope equation of the line is $y-3=\frac{1}{5}(x-2)$

Learn more:

You can learn more about the linear equation in brainly.com/question/12941985

#LearnwithBrainly

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