3 years ago

What are the dimensions of the vertical cross section shown on this right rectangular prism show. Below

Mathematics

2 answers:

Vlada [557]3 years ago

7 0

Answer:

C. 5 in. times 4 in.

Step-by-step explanation:

olya-2409 [2.1K]3 years ago

3 0

Answer:

Step-by-step

The 12 inch dimension is at right angles to the face in question. Any answer with 12 is incorrect.

A B and D are all wrong for that reason.

So the answer must be C. The 5 and 4 are both parallel to the cross sectional face

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The predicted cost c (in hundreds of thousands of dollars) for a company to remove p% of a chemical from its waste water is show

alukav5142 [94]

We presume your cost function is
c(p) = 124p/((10 +p)(100 -p))

This can be rewritten as
c(p) = (124/11)*(10/(100 -p) -1/(10 +p))

The average value of this function over the interval [50, 55] is given by the integral
$\frac{1}{55-50} \times \frac{-124}{11} \int\limits^{55}_{50} {(\frac{1}{x+10}+\frac{10}{x-100})} \, dx$
This evaluates to
(-124/55)*(ln(65/60)+10ln(45/50)) ≈ 2.19494

The average cost of removal of 50-55% of pollutants is about
$2.19 hundred thousand = $219,000