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2 years ago

A piece of aluminium has a volume of 6.0cm^3 and a density of 2.70 g\cm^3 what is its mass????

1 answer:

7 0

Density = Mass / volume is the original equation.

If we change it to solve for mass:

Mass = (Density)(volume)

Plug in the numbers:

M = (2.70 g/cm^3)(6.0cm^3) = 16.2 g

Hope that helps! :)

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I dont understand this

vladimir1956 [14]

N = 40
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2 years ago

What is the maximum height the cricket reaches?

enyata [817]

Answer:

Step-by-step explanation:

we have that

h(t) = –16t² + 14t

using a graph tool

see the attached figure

the cricket’s hang time is the difference between point (0,0) and (0.875,0)

(0.875-0)=0.875 sec

the answer is 0.875 sec

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2 years ago

Read 2 more answers

What is 13/20 written as a decimal?

leonid [27]

To find decimals out of fractions, you divide 13 and 20, which equals 0.65.

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2 years ago

A group of 59 randomly selected students have a mean score of 29.5 with a standard

algol [13]

Answer:

$29.5-1.671\frac{5.2}{\sqrt{59}}=28.37$

$29.5+1.671\frac{5.2}{\sqrt{59}}=30.63$

And we can conclude that the true mean for the scores are given by this interval (28.37; 30.63) at 90% of confidence

Step-by-step explanation:

Information given

$\bar X = 29.5$ represent the sample mean

$\mu$ population mean

s= 5.2 represent the sample standard deviation

n=59 represent the sample size

Confidence interval

The confidence interval for the true mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom are given by:

$df=n-1=59-1=58$

The Confidence interval is 0.90 or 90%, the significance is $\alpha=0.1$ and $\alpha/2 =0.05$ , and the critical value is $t_{\alpha/2}=1.671$

Now we have everything in order to replace into formula (1):

$29.5-1.671\frac{5.2}{\sqrt{59}}=28.37$

$29.5+1.671\frac{5.2}{\sqrt{59}}=30.63$

And we can conclude that the true mean for the scores are given by this interval (28.37; 30.63) at 90% of confidence

8 0

2 years ago

Start to finish must use all boxes, cant go diagonally

aleksandr82 [10.1K]

start at the top and go down one then go to the right and the vice verse

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8 0

2 years ago