3 years ago

What is the answer to 8

Mathematics

1 answer:

sergejj [24]3 years ago

8 0

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PLEASE ANSWER HURRY!!!!!

Arisa [49]

Answer:-1

Step-by-step explanation:

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3 years ago

During a recent drought, a water utility in a certain town sampled 100 residential water bills and found that 80 of the residenc

Anastasy [175]

Answer: 0.893

Step-by-step explanation:

Given : Sample size of residential water bills: n=100

Number of residences had reduced their water consumption over that of the previous year = 80

Then sample proportion: $\hat{p}=\dfrac{80}{100}=0.8$

Critical value for 98% confidence= $z_{\alpha/2}=2.326$

The upper bound for confidence interval for population proportion :

$\hat{p}+ z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$=0.8+ (2.326)\sqrt{\dfrac{0.8(1-0.8)}{100}}\\\\=0.8+0.09304=0.89304\approx0.893$

Hence, the 98% upper confidence bound for the proportion of residences that reduced their water consumption.=0.893

4 0

3 years ago

Please help asap - will give 20 points

Ludmilka [50]

Answer:

3 more weeks. this is the answer. just took the assignment

5 0

4 years ago

Read 2 more answers

HELPP ILL GIVE BRAINLIEST,<br> Drag a description to match each equation.

Orlov [11]

Answer:

First one is the y is 3 times x

Second one is y is 3 more than x

Step-by-step explanation:

y is 3 times x is y = 3x

y is 3 more than x is y = x + 3

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2 years ago

A dance academy charges $24 per class and a one time registration fee of $15. A student paid a total of $687 to the academy. Fin

dem82 [27]

Answer:

The student took 28 classes

Step-by-step explanation:

What I did was minus $15 from the $687 total, cause $15 is only a one time registration fee, then 687-15=672, so then I divided 672 by the cost per class, so $24, 672 divided by 24 equals to 28, so the student took 28 classes.

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3 years ago