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3 years ago

PLEASE HELP THIS IS DUE REALLY SOON!!

Mathematics

1 answer:

tensa zangetsu [6.8K]3 years ago

6 0

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Step-by-step explanation:

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429-278+34(6)=975(5)

sladkih [1.3K]

355=4825, so both sides are not equal to each other.

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3 years ago

-12-2x<-3x+2<-2(x-7)

Dafna11 [192]

$x < 14 \\ x > - 12$

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3 years ago

Read 2 more answers

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 anyone help me

docker41 [41]

<h2>Math Problem </h2>

If die is rolled two times, find the probably of getting "1'twice.

<h2>Math Answer </h2>

${1}\{36}$

Feel fre e too ask me 

Please understand it

#BrainliestBunch

8 0

3 years ago

About how many molecules of water are in a swimming pool that holds 200 m^3 of water ? Write your answer in scientific notation

ddd [48]

metric is very conveinient
1gram=1cm^3 of water
1m^3=1,000,000,000 grams

water is 18.015 grams per mole
(1,000,000 grams water)/(18.015 grams/mole) = 55509.3 moles

there are 6.02e23 molecules in 1 mole of water so
55509.3 moles * (6.0221E23) = 3.3428E27 molecules of water in 1m^3 of water
so we have200 of those
200 times 3.3428E27=6.6856E29 molecules

answer is 6.6856 times 10^29 mlecules

4 0

4 years ago