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lesya692 [45]
3 years ago
9

Which number is written in scientific notation?

Mathematics
1 answer:
AysviL [449]3 years ago
6 0

Answer:

I would say A. 7.8 x 10^-5

Step-by-step explanation:

7.8 x 10^-5 can also be written as 7.8 times 10 to the negative fifth power or the exponent of negative five. But, if you solve it you would get 0.000078 as the real number.

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Please help asap please..ill give Brainliest
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Answer:

There are no solutions

Step-by-step explanation:

Because the lines are parallel, they will never meet, meaning there are no solutions to this system of equations

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- у<br> 6x - 4у - 2<br><br> What is the next step?
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Answer:

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3 years ago
The population of a city has decreased by 38% since it was last measured. If the current population is 27,900, what what the pre
Varvara68 [4.7K]

<u>Answer: </u>

The population of a city has decreased by 38% since it was last measured. If the current population is 27,900 .Previous population of city was 45000.

<u> Solution: </u>

Given that current population of city is 27900.  

Also, population of a city has decreased by 38% since it was last measured.

Let assume that population of city when it was last measured = x

Decreased of 38% means x-38% of x . we can write this as,

=x-\frac{38}{100} \times x

=\frac{100 x-38 x}{100}

=\frac{62 x}{100}=\frac{31 x}{50}

So current population is \frac{31 x}{50}

Equating above expression to the given value of current population, we get

\frac{31 x}{50}=27900

x=\frac{27900 \times 50}{31}

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Hence previous population of city was 45000.

7 0
3 years ago
Eight less a number is less than or equal to seventeen
allsm [11]

Answer:

n ≥ -9  

Step-by-step explanation:

Let n = the number

8 <em>less than</em> a number means "n – 8", but

8 <em>less</em> a number means "8 – n," so

8 – n ≤ 17     Subtract 8 from each side

    -n ≤ 9      Multiply each side by -1

    n ≥ -9

<em>Note</em>: When we multiply by a negative number, we must reverse the inequality.

<em>Check:</em>

Try n = -8.

8 – (-8) ≤ 17

  8 + 8 ≤ 17

       16 ≤ 17

<em>True</em>.

8 0
3 years ago
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