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3 years ago

It takes more time to heat 100 liters of water than 10 liters of water because _____.

Mathematics

2 answers:

sergiy2304 [10]3 years ago

8 0

Answer:

boiling point decreases with a decrease in volume. there are more molecules to heat in 100 liters than in 10 liters. the molecules are closer together in 100 liters than in 10 liters

Step-by-step explanation:

mixas84 [53]3 years ago

3 0

<span>... because there are more molecules to heat in 100 liters than in 10 liters.

_____
This assumes energy is supplied to the water at a constant rate, and that the various volumes of water are liquid at the same starting temperature and pressure.</span>

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4)In order to set rates, an insurance company is trying to estimate the number of sick daysthat full time workers at an auto rep

bagirrra123 [75]

Answer:

A sample of 18 is required.

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:

$\alpha = \frac{1 - 0.92}{2} = 0.04$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.04 = 0.96$ , so Z = 1.88.

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 indicated that the standard deviation was 2.2 days.

This means that $\sigma = 2.2$

How large a sample must be selected if the company wants to be 92% confident that the true mean differs from the sample mean by no more than 1 day?

This is n for which M = 1. So

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

$1 = 1.88\frac{2.2}{\sqrt{n}}$

$\sqrt{n} = 1.88*2.2$

$(\sqrt{n})^2 = (1.88*2.2)^2$

$n = 17.1$

Rounding up:

A sample of 18 is required.

3 0

3 years ago

Divide 270 in the ratio 3:2:1

Contact [7]

3 + 2 + 1 = 6

270 ÷ 6 = 45

45 × 3 = 135

45 × 2 = 90

45 × 1 = 45

3 : 2 : 1

135 : 90 : 45

6 0

3 years ago

Plz plz plz will give bianleast plz hlpe

tester [92]

60, 60 and 60 degrees

There are two criteria: the angles have to all be equal and they have to add up to 180 degrees. This answer satisfies both criteria.

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3 years ago

Read 2 more answers

Help with this math question please

Step2247 [10]

The base of log is 10. So raising both sides to 10, we get:

$10^{0.94} = 10^{ log_{10} x} \\ \\ 
 10^{0.94}=x \\ \\ 
x= 8.71$

S, rounding of to nearest hundredth, the value of x in the equation 0.94 = log(x) comes out to be 8.71.

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2 years ago

Write the percent as a fraction and as a decimal.

s2008m [1.1K]

2% -decimal 0.02
2%- fraction 1/50
4- fraction 2/5
4-decimal0.04

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3 years ago