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3 years ago

Is 1,815 a rational number?

Mathematics

2 answers:

Brut [27]3 years ago

7 0

Answer:

The square root of 1815 is a rational number if 1815 is a perfect square. It is an irrational number if it is not a perfect square. Since 1815 is not a perfect square, it is an irrational number.

Step-by-step explanation:

I comfirmed this, it’s most likely right! (;

rewona [7]3 years ago

3 0

If a number can be represented by a fraction, it is a rational number. So yes, 1815 is a rational number

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What is the value of 5p2 + q? for p = 8 and q = 2?<br> 5p? +2 =

viktelen [127]

5*8+2

When a letter is next to a number u multiply

5*8+2=42

5 0

3 years ago

On a map, 2 inches represents 60 miles. What part of an inch represents 12 miles? Please show how you get you answer.

e-lub [12.9K]

C: 2/5 inches is your answer

if 2 inches are 60 miles then 12 miles is a fifth of 2 inches.

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4 years ago

Suppose that you want to estimate average income in a population. If the standard deviation of income in the population is $1,00

Alik [6]

Answer:

2401

Step-by-step explanation:

Given that we want to estimate average income in a population.

The standard deviation of income in the population is $1,000

We want confidence interval around our estimate to be +/- $40

i.e Margin of error = 40

We know that margin of error = Std error * Z critical for 95%

i.e. $40 = 1.96 * std error$

Std error = $\frac{std dev}{\sqrt{n} } \\=\frac{1000}{\sqrt{n} }$

Together we get

$40=1.96(\frac{1000}{\sqrt{n} } )\\\sqrt{n} =\frac{1000*1.96}{40} \\=49\\n=2401\\$

3 0

3 years ago

What is greater than 3.2 x 10-3

Volgvan

Answer:

3.2x10-3=2.18 or x=2.18 So one thats greater is 8.0x+6-2=4.0 or x=4

Step-by-step explanation:

I wasnt sure about what they were asking but here.

3.2x=10-3 8.0x+6-2

+3 +3 +2 +2

3.2x+3=10 8.0x+2=6

-3 -3 -2 -2

3.2x=7 8.0x=4

7/3.2 = 2.18 ÷4 ÷4

x=4

I think I did this a bit wrong...but I hope this helps a little bit!

6 0

3 years ago

A car travels 14km in 25mins . Find out how far the car can travel in 5 hours if the speed remains the same ?

jekas [21]

<h3><u>Answer :- </u></h3>

168 km ...

<h3><u>Explanation :- </u></h3>

It is given that the car travels 14km in 25 minutes..

Now , assume that the distance the car travel in 5 hours be x..

Since 1 hour = 60 minutes..
5 hours = 300 minutes ..

• Thus , The two given statements are :-

14km -----------------> 25 minutes..
And, x km -------------> 300 minutes..

The distance travelled by car and the time taken by the car is directly proportional to each other....

$\frac{14}{25} = \frac{x}{300}$

$= x = 168km$

• Hence , Car can travel 168km in 5 hours ..

Hope this helps you :)

6 0

2 years ago