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2 years ago

A 16,000 ftB 8000 ftC 4000 ftD 150 ft

Mathematics

2 answers:

Viefleur [7K]2 years ago

6 0

Answer:

A 16,000 ft³

Step-by-step explanation:

Let's say the dimensions were 2, 10, and 100 now if you double those, it becomes 4, 20, 200 which equals 16,000.

Now let's say the dimensions were 2, 4, 250 double the dimensions again and it becomes 4, 8, 500 which equals 16,000.

So no matter what the dimensions are, the volume will be 16,000.

Cloud [144]2 years ago

3 0

Answer:

Step-by-step explanation:

If all of the dimensions of the tank are doubled, since we live in three dimensions, the volume of the new tank will be $2^3=8$ times as large. $8\cdot 2000=16000$ feet, or answer choice A. Hope this helps!

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supervisor records the repair cost for 25 randomly selected dryers. A sample mean of $93.36 and standard deviation of $19.95 are

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<h2><u>Answer with explanation:</u></h2>

The confidence interval for population mean (when population standard deviation is unknown) is given by :-

$\overline{x}-t^*\dfrac{s}{\sqrt{n}}< \mu$

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t* = Critical value.

Given : n= 25

Degree of freedom : $df=n-1=24$

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$s=\ $19.95$

Significance level for 98% confidence interval : $\alpha=1-0.98=0.02$

Using t-distribution table ,

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Then, the 95% confidence interval would be :-

$93.36-(2.4922)\dfrac{19.95}{\sqrt{25}}< \mu$

$=93.36-9.943878< \mu$

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Hence, the 98% confidence interval for the mean repair cost for the dryers. = $83.4161$

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Step-by-step explanation:

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2 years ago

I need help with these two questions

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Problem 4

Answer: 47

------------------------

Work Shown:

f(x) = x^2 - 7x + 3
f(x) = (x)^2 - 7(x) + 3
f(-4) = (-4)^2 - 7(-4) + 3 ... replace each x with -4
f(-4) = 16 - 7(-4) + 3
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f(-4) = 47

============================================================

Problem 5

Answer: See the attached image for the table

------------------------

Work Shown:

Plug in n = 27 and we get...
C = 26 + 10*n
C = 26 + 10*27
C = 26 + 270
C = 296
The input n = 27 leads to the output C = 296. This means that 27 people will have the cost be $296

Do the same for n = 39
C = 26 + 10*n
C = 26 + 10*39
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The input n = 39 leads to the output C = 416. This means that 39 people will have the cost be $416

and also n = 43 as well
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C = 26 + 10*43
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