Answer:
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Complete question;
<em>The distribution of lengths of salmon from a certain river is approximately normal with a standard deviation of 3.5 inches. If 10 percent of salmon are longer than 30 inches, which of the following is closest to the mean of the distribution? 26 inches A 28 inches B 30 inches C 33 inches D 34 inches</em>
Option B is correct. The value that is closest to the mean of the distribution is 30inches.
The formula for calculating the z-score is expressed as:

Given the following parameters

If 10 percent of salmon are longer than 30 inches, then:
Using the z table to get the value corresponding to the mean area 0.1.
- The required z-score will be -1.285
Substitute the resulting parameters into the formula to get the mean of the distribution.

Hence the value that is closest to the mean of the distribution is 30inches.
Learn more here: brainly.com/question/15295437
The statements that best describes an unintended environmental consequence of aquaculture fish-farm enclosures located in estuaries is Aquaculture enclosures can harbor parasites that can negatively affect wild populations that breed in estuaries.
<h3>What is an estuary?</h3>
An estuary can be regarded as partially enclosed, water body which consists of mixture of freshwater from rivers as well as salt water from the ocean.
However, unintended environmental consequence of aquaculture fish-farm enclosures located in estuaries is that parasite can be easily decrease the populations of breed.
Learn more about estuary at;
brainly.com/question/14001282
If it is a single die rolled then the probability is 1/6 but if it is a pair of dice then the probability is going to be doubled and it becomes 1/36