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lys-0071 [83]
4 years ago
5

A graduated cylinder with 10.0 mL of water ha mass of 25.0 g. 51 paper clips are added to the graduated cylinder . The total mas

s is 28 and the total volume is 14.7. What is the density of the paper clips? (Calculate your answer to 2 decimal places)
Mathematics
1 answer:
Tatiana [17]4 years ago
6 0

Answer: The density of the paper clips is 0.64 g/ml.

Step-by-step explanation:

Given : Volume of water = 10.0 mL

mass of water =  25.0 g

After 51 clips added to water , the total mass = 28 g

Total volume = 14.7

Mass of clips =  total mass - mass of water

= 28 g-25g = 3g

Volume of clips = Total volume- Volume of water

= 14.7- 10.0 = 4.7 ml

Density of paper clips =\dfrac{\text{Mass of paper clips}}{\text{Volume of paper clips}}

=\dfrac{3}{4.7}=0.638297\approx0.64\ g/ml

Hence, the density of the paper clips is 0.64 g/ml.

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A garden supply store sells two types of lawn mowers. The smaller mower costs $249.99 and the larger mower costs $329.99. 30 tot
lys-0071 [83]

Answer:

15( b+ a) - 2(a + 0 ) = c

then

c+b = t

We could put the two together to make 15(b+a)- 2(a+0) + b = t

Where t = 8379.70

a= £249.99  b= 329.99

Step-by-step explanation:

Equal amounts are 8549.7 from 30 mowers a+b = small and large.

If we use this as an even and take away a+b at different equations we can find the answer to be 8379.70 on the 2nd equation. First equation = 8579.70

8549.7- 249.99-249.99+329.99 to equal the given year to find c in first equation and total in year = t within the above equation.

6 0
3 years ago
Use distributive property to simplify 5 ( 6x - 2 )
uysha [10]
The answer would be 30x-10
6 0
3 years ago
Read 2 more answers
The equation y = 19.43x +609.077 is the equation of the regression line that predicts the number of people attending a county fa
atroni [7]

Answer:

1,114 people

Step-by-step explanation:

The equation y=19.43x+609.077 is the equation of the regression line that predicts the number of people attending a county fair, where x is the number of years after 2000.

To find the number of people that are expected to attend the fair in 2026, we determine how many years have passed and substitute into the equation.

From 2000 to 2026,

2026-2000=26yrs

have passed.

The expected number who will attend the fair in 2026 is

y=19.43*26+609.077

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To the nearest whole number 1,114 people will attend in 2026

5 0
4 years ago
How do you find 55% of 140?
yaroslaw [1]
If you type in calculator on google click the buttons and do 140 divided by 55% but the long way to do a percentage problem is to find 1% of the number you start off with and multiply it by the percentage so in this case 1% of 140 would be 1.4 and multiply that by 55 t
3 0
3 years ago
You are told that a 95% confidence interval for a population proportion is (0.3775, 0.6225) What was the sample proportion that
Maru [420]
The mean of the confidence interval is (0.3775 + 0.6225) / 2 = 0.5. Therefore, the standard deviation of the proportion would have been sqrt[0.5*(1 - 0.5) / n], where n is the sample size. This expression simplifies to sqrt(0.25/n).

A 95% CI has a corresponding z = 1.96, so since the distance from 0.5 to 0.3775 (or 0.6225 to 0.5) is equal to 0.1225. Therefore, if we divide 0.1225 / 1.96 = 0.0625, we get the value of the SD, and this should be equal to sqrt(0.25/n).

0.0625 = sqrt(0.25/n)
n = 64
This means that the proportion was 0.5 and the sample size was 64.
6 0
3 years ago
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