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antoniya [11.8K]
3 years ago
14

Suppose the concentration of a certain pollutant is uniformly distributed in the range of 4 to 20 ppm (parts per million). if a

concentration in excess of 15 ppm is considered toxic, what is the probability that a specimen will yield a toxic concentration level
Mathematics
1 answer:
lbvjy [14]3 years ago
6 0
Uniform probability?  Here the probability function graph is a rectangle of length 20-4 (or 16) and width / height of 1/16.  Note that the area under the graph from x=4 to x=20 is 1 (which is always the case when we're discussing probability functions).  The area under the graph from 15 to 20 is (20-15)(1/16), or
5(1/16), or 5/16.  Thus, the probability that a specimen will yield a toxic concentration level is 5/16.

I have no way of knowing what you already know about probability distributions.  If you need a more detailed explanation, please ask questions here.
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The Lane School sold 1,152 granola bars to raise money for digital cameras. All the granola bars were either berry bars or raisi
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Answer:

26 boxes of raisin bars

Step-by-step explanation:

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1152-528=624 ➗ 24 = 26

7 0
3 years ago
Find the commission on a $1,250 sale with a commission rate of 5%.
Nana76 [90]
Essentially, we must take 5% of $1250. When we drop the percent sign, we move the decimal 2 places to the left, giving .05. Then "of" means multiply. We take $1250 and multiply times .05, giving 
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5 0
3 years ago
Read 2 more answers
A gift bag is shaped like a rectangular prism and has a volume of 1152 cubic inches. The width of the bag is w, the length is 2w
Dafna11 [192]
1. You must use the formula for calculate the volume of a rectangular prism, which is:

 V=(h)(l)(w)

 V: It is the volumen of the rectangular prism (V=1152 inches³).
 h: It is the height of the rectangular prism (h=18-w).
 l:It is the lenght of the rectangular prism (l=2w+4).

 2. When you substitute these calues into the formula, you obtain:

 V=(h)(l)(w)
 1152=(18-w)(2w+4)(w)
 (18-w)(2w+4)(w)-1152=0

 3. Then, you should mutiply them:

 36w²-2w³+72w-4w²-1152=0
 32w²-2w³+72w-1152=0

 4. When you factor, you obtain:

 2(w-16)(w-6)(w+6)

 w1=16
 w2=6
 w3=-6

 5. The problem says that the height is greater than the width, therefore, the widht is:

 w=6 inches

 6. The length is:

 l=2w+4
 l=2(6)+4
 l=16 inches

 7. And the height is:

 h=18-w
 h=18-6
 h=12 inches

 What are the dimensions of the bag?

 The dimensions of the bag are:

 l=16 inches
 h=12 inches
 w=6 inches  
8 0
3 years ago
QUADRATIC EQUATION â€" WORD PROBLEMS
dusya [7]

Answer: -7, 12

Step-by-step explanation:

a+b = 5

a*b = -84

a = 5-b

(5-b)*b = -84

-b^2 + 5b + 84 = 0

(-b - 7)(b + 12) = 0

The roots are -7 and 12.

I'm not sure what â€" stands for

4 0
3 years ago
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