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3 years ago

The cost of producing 4 metal units is 204.80. The cost of producing 8 units is 209.60. What is the cost to produce 12

Mathematics

2 answers:

Arisa [49]3 years ago

7 0

$214.40 is the correct answer

inessss [21]3 years ago

3 0

The cost of 12 units would be $614.40.

This is found by dividing $204.80 by 4 to get $51.20 (cost per single unit), then multiplying $51.20 by 12 to get $614.40 (cost for 12 units).

I hope this helps!

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Randy is twice as old as his sister jane. together the sum of their ages is 15. how old is randy?

iren [92.7K]

The sum is 15.
Divide 15 by three to get Jane's age= 5
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2 years ago

The commute times for workers in a city are normally distributed with an unknown population mean and standard deviation. If a ra

Elenna [48]

Answer:

The 95% confidence interval for population mean is (18.19, 23.81).

Step-by-step explanation:

The confidence interval for population mean using the Student's t-distribution is:

$CI=\bar x\pm t_{\alpha /2, (n-1)}\frac{s}{\sqrt{n} }$

Given:

$\bar x=21\\s=6\\n=20\\\alpha =1-0.95=0.05$

The critical value of t for α = 0.05 and degrees of freedom, (n - 1) = 19 is:

$t_{\alpha /2, (n-1)}=t_{0.05/2, 19}=2.093$

Compute the 95% confidence interval for population mean as follows:

$CI=\bar x\pm t_{\alpha /2, (n-1)}\frac{s}{\sqrt{n} }\\=21\pm2.093\times \frac{6}{\sqrt{20} }\\=21\pm2.81\\=(18.19, 23.81)$

Thus, the 95% confidence interval for population mean is (18.19, 23.81).

4 0

3 years ago

Bob and Tara together can lift 318.7 lb. Bob can lift 22.1 more pounds than Tara. How much can Bob and Tara each lift?

SSSSS [86.1K]

Bob and Tara lifts 318.7lb.
So each one would, ideally, be lifting half.
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137,25.
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3 years ago

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densk [106]

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3 years ago

Help asap please !!!!

Leona [35]

Answer:

C =diameter times π

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2 years ago