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2 years ago

Round 118,561 to the nearest thousand?

Mathematics

1 answer:

Radda [10]2 years ago

7 0

Answer:

119,000

Step-by-step explanation:

If the number behind where you want to round is 5 or more you round up. If it is 4 or less you round down.

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The difference of three times a number and six is nine.

Dafna11 [192]

Answer:

The number is 3

Step-by-step explanation:

3 times 3 is 9

6 times 3 is 18

the difference between 9 and 18 is 9 therefore the number is 3

7 0

3 years ago

Read 2 more answers

A large on-demand, video streaming company is designing a large-scale survey to determine the mean amount of time corporate exec

Firdavs [7]

Answer:

554 executives should be surveyed.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

Standard deviation of 3 hours.

This means that $\sigma = 3$

The 95% level of confidence is to be used. How many executives should be surveyed?

n executives should be surveyed, and n is found with $M = 0.25$ . So

$M = z\frac{\sigma}{\sqrt{n}}$

$0.25 = 1.96\frac{3}{\sqrt{n}}$

$0.25\sqrt{n} = 1.96*3$

$\sqrt{n} = \frac{1.96*3}{0.25}$

$(\sqrt{n})^2 = (\frac{1.96*3}{0.25})^2$

$n = 553.2$

Rounding up:

554 executives should be surveyed.

8 0

3 years ago

The corner section of a football stadium has 6 seats on the first row. Each row after that has an additional 3 seats. How many s

julia-pushkina [17]

9514 1404 393

Answer:

Step-by-step explanation:

The number of seats in a row will give an arithmetic sequence:

6, 9, 12, 15, ...

The first term is 6; the common difference is 3. The general term is ...

an = a1 +d(n -1) . . . . . . n-th term of sequence with first term a1, difference d

The 20th term of the sequence is ...

a20 = 6 +3(20 -1) = 6 +57 = 63

There would be 63 seats on the 20th row.

7 0

2 years ago

I cant fail this it’s my exam please help anyone

Olin [163]

The answer is b because it is b

5 0

2 years ago

Read 2 more answers

I don't understand rational and irrational numbers

PSYCHO15rus [73]

A rational number is a number which can be expressed as a fraction whose numerator and denominator are both integers and whose denominator is not equal to zero. Rational numbers include all integers, fractions, mixed numbers, and some decimal numbers.

Note : All terminating and repeating decimal numbers are rational numbers because those numbers can be expressed as a fraction. On the other hand, a non repeating number and non terminating decimal, like square root of 2, is an irrational number.

$\dfrac{7}{16} \ as \ a \ decimal = 0.4375$