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sleet_krkn [62]
3 years ago
11

Peter is 5 ft, 11 inches tall. Paul is 176 cm tall. Who is taller?

Chemistry
1 answer:
arlik [135]3 years ago
8 0
Peter is taller, convert cm to in.
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What is the number of electron and neutron protons in atom 35?
Fittoniya [83]
The mass number = protons + neutrons. Bromine has a mass number of 80<span> and 35 protons so </span>80<span>-35 = </span>45<span> neutrons. b) How many electrons does the neutral atom of bromine have? The neutral atom of bromine has 35 electrons because the number of electrons equals the number of protons.</span>
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3 years ago
A mileage test is conducted for a new car model. Thirty randomly selected cars are driven for a month and the mileage is measure
Leni [432]

Answer:  (27.81,\ 29.39)

Explanation:

Given : Sample size : n= 30 , it means it is a large sample (n≥ 30), so we use z-test .

Significance level : \alpha: 1-0.95=0.05

Critical value: z_{\alpha/2}=1.96

Sample mean : \overline{x}=28.6

Standard deviation : \sigma=2.2

The formula to find the confidence interval is given by :-

\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}

i.e. 28.6\pm (1.96)\dfrac{2.2}{\sqrt{30}}

i.e. 28.6\pm 0.787259889321

\approx28.6\pm 0.79=(28.6-0.79,28.6+0.79)=(27.81,\ 29.39)

Hence, the 95% confidence interval for the mean mpg in the entire population of that car model = (27.81,\ 29.39)

4 0
3 years ago
What is formed when atoms join together with a covalent bond?
Feliz [49]

B) a molecule

A molecule is formed when two atoms join together with a covalent bond.

5 0
3 years ago
Read 2 more answers
Which of the following determines the type of element that an atom makes?
emmainna [20.7K]
The answer is B, the number of protons

It's is the unique thing about every element!

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What does symbiosis mean in your words. science work​
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Explanation:

hope this helps!

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3 years ago
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