How to round to the naerst 10?

1 answer:

3 0

So, say your # was 6,234,578. you would go to the seven and look to the number next to in, so 8, and if the neighbor is 5 or bigger, you make the number, in this case a 7 an 8. Last, you make all the other #s after the one you rounded 0. So the answer would be:

6,234,570.0

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Simplify the expression fraction with numerator of the square root of negative four and denominator of the quantity three plus i

Alex787 [66]

Answer:

$\frac{-4+2i}{5}$

Step-by-step explanation:

We are given the expression, $\frac{\sqrt{-4}}{(3+i)-(2+3i)}$

On simplifying, we have,

$\frac{2i}{3+i-2-3i}$

i.e. $\frac{2i}{1-2i}$

Now, we will rationalize the expression,

i.e. $\frac{2i}{1-2i}\times \frac{1+2i}{1+2i}$

i.e. $\frac{(2i)\times (1+2i)}{(1-2i)\times (1+2i)}$

i.e. $\frac{2i+4i^{2}}{1-4i^{2}}$

Since, $i^{2}=-1$ , we get,

i.e. $\frac{2i-4}{1+4}$

i.e. $\frac{-4+2i}{5}$

So, the simplified expression is $\frac{-4+2i}{5}$ .

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AURORKA [14]

First you need to find the area of the lawn. To find the area of a square, you multiply two sides together. You have two sides given, which is super helpful.

I put in my calculator, (40+4/5)x(50+7/8) and this gave me the answer of 2075.7.
You need to then divide that number by 500, and divide it by 300, and then round up, cause if you round down you’re not gonna have enough seed.

2075.7/500 = 4.1514, but then this needs to be rounded up or he’ll be 0.1514 short. So he needs 5 bags for the highest setting.

2075.7/300 = 6.919, so for the lowest setting, he needs 7 bags of seed.

This should be correct.

Hope this helps :)

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