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2 years ago

A number a is to the left of the number b on the number line how do the numbers -a and -b compare?

Mathematics

1 answer:

Leokris [45]2 years ago

8 0

Answer:

-a will be greater than -b because for example, when a=2 and b=5, -a=-2 and -b=-5

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Order these numbers in ASCENDING order. 0.7 2/3 6/8 65%

Kryger [21]

Answer:

65%, 2/3, 0.7, 6/8

Step-by-step explanation:

4 0

3 years ago

A ticket to a movie for a student is $7. The cost for an adult is $2 mor than for a student. How much would it cost 5 adults and

yulyashka [42]

Adults: $45
Students: $203
Hope that’s correct

3 0

2 years ago

The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day.

valina [46]

Answer:

A sample of 179 is needed.

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:

$\alpha = \frac{1 - 0.85}{2} = 0.075$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.075 = 0.925$ , so Z = 1.44.

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.

A previous study found that for an average family the variance is 1.69 gallon?

This means that $\sigma = \sqrt{1.69} = 1.3$

If they are using a 85% level of confidence, how large of a sample is required to estimate the mean usage of water?

A sample of n is needed, and n is found for M = 0.14. So

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

$0.14 = 1.44\frac{1.3}{\sqrt{n}}$

$0.14\sqrt{n} = 1.44*1.3$

$\sqrt{n} = \frac{1.44*1.3}{0.14}$

$(\sqrt{n})^2 = (\frac{1.44*1.3}{0.14})^2$

$n = 178.8$

Rounding up

A sample of 179 is needed.

7 0

3 years ago

Help! Please!

fomenos

Answer:

is the board game to BOARD for Neal so you have 1.54

Step-by-step explanation:

its ligit 5.5

6 0

2 years ago

What is the difference between these fractions?<br><br> +3/4−(+7/8)

Ket [755]

Answer:

1/8

Step-by-step explanation:

3/4 is 6/8 and 6/8 - 7/8 is 1/8

4 0

2 years ago

Read 2 more answers