3 years ago

What is the maximum number of possible solution for the system shown below

Mathematics

1 answer:

AURORKA [14]3 years ago

3 0

the product of the numbers is 44. i dont know if this is right but i tried

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The volume of a paint can is 215 in. If the height of the cam is 7.5 in, what is the radius to the nearest whole number?

kati45 [8]

formula for volume = V=PI x r^2 x H so replace letters with known values and work the problem out

215 in.^3 = 3.14 x r^2 x 7.5

215/(7.5x3.14) = r^2/(7.5 x 3.14)

r^2 = (215/7.5x3.14)

r^2 = 9.1295

Now, taking the square root of both sides, we get:

sqrt(r^2) = r

sqrt(9.1295) = 3.021

r = 3 inches

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Step-by-step explanation:

Multiply grams per gallon times gallons to get grams.

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This question is impossible! For two different variables, we need two different equations. Without that, there is no hope! :)

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A study of 420 comma 000 cell phone users found that 134 of them developed cancer of the brain or nervous system. Prior to this

Vesnalui [34]

Answer: (0.00306,0.00334)

Step-by-step explanation:

Given : Sample size : n= 420000

The number of users developed cancer of the brain or nervous system =134

Then , the proportion of users developed cancer of the brain or nervous system :

$p=\dfrac{134}{420000}\approx0.0032$

Significance level : $1-0.90=0.1$

Critical value : $z_{\alpha/2}=1.645$

The confidence interval for population proportion is given by :-

$p\ \pm\ z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}\\\\=0.0032\pm (1.645)\sqrt{\dfrac{(0.0032)(1-0.0032)}{420000}}\approx0.0032\pm0.00014\\\\=(0.00306,0.00334)$

Hence, the 90% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system is (0.00306,0.00334).

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