3 years ago

Total

Mathematics

2 answers:

jekas [21]3 years ago

5 0

Answer:

Step-by-step explanation:

Paul [167]3 years ago

4 0

Answer:

Step-by-step explanation:

If you work backwards and add everything up it works.

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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

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3 years ago

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Lelechka [254]

142 easy peasy. This is an easy one

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3 years ago

a rug shaped like a rectangle has a width of 3 m. the length if the rug is 2 m greater than its width. what is the perimeters of

irina1246 [14]

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3 years ago

A.5÷4 divide and show work

expeople1 [14]

Answer:

1.25

Step-by-step explanation:

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Some jeans at Macy's normally cost $80. During a sale Alexia buys them for $14 off. What percent will she save?

viva [34]

Answer:

down below.

80 - 14 = 66

66 × 100 ÷ 80 = 82.5%

Alexia saves 82.5%

8 0

3 years ago