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vodka [1.7K]
3 years ago
10

Can anyone help me with this math problem? Thank you.

Mathematics
1 answer:
pickupchik [31]3 years ago
4 0

Step-by-step explanation:

Answer is in the picture.

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A factory dumps an average of 2.43 tons of pollutants into a river every week. if the standard deviation is 0.88 tons, what is t
vovikov84 [41]
25.8%  
First, determine how many standard deviations from the norm that 3 tons are. So:
 (3 - 2.43) / 0.88 = 0.57/0.88 = 0.647727273  
So 3 tons would be 0.647727273 deviations from the norm. Now using a standard normal table, lookup the value 0.65 (the table I'm using has z-values to only 2 decimal places, so I rounded the z-value I got from 0.647727273 to 0.65). The value I got is 0.24215. Now this value is the probability of getting a value between the mean and the z-score. What I want is the probability of getting that z-score and anything higher. So subtract the value from 0.5, so 0.5 - 0.24215 = 0.25785 = 25.785%  
So the probability that more than 3 tons will be dumped in a week is 25.8%
5 0
2 years ago
5a - 9 + a = 9
Ne4ueva [31]

Answer:

a = 3

Step-by-step explanation:

1) Simplify 5a - 9 + a to 6a - 9.

6a - 9 = 9

2) Add 9 to both sides.

6a = 9 + 9

3) Simplify 9 + 9 to 18.

6a = 18

4) Divide both sides by 6.

a =  \frac{18}{6}

5) Simplify 18/6 to 3.

a = 3

Therefor, the answer is, a = 3.

7 0
2 years ago
I will mark branliest if correct
n200080 [17]

Answer:

The answer is: y = - |x+1|+1

5 0
2 years ago
Read 2 more answers
Show that parallelogram with its diagonals intersecting at 90° is rhombus.
34kurt
I do not have an answer for that, but you should try looking for that on google or yahoo answers.
8 0
3 years ago
Rectangle PQRS with vertices P(- 6, 9) , Q(3, 6); R(0, - 9) and S(- 9, - 6)
STatiana [176]

Answer:

multiply the original coordinate by 3 so its c

Step-by-step explanation:

multiply the original coordinate by 3

6 0
2 years ago
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