Mathematics, 23.04.2021 18:00 goosenar

Suppose that a marine biologist will draw a random number. She will then add 9 times this number of grams of plankton to a tank. If the tank has 88g of plankton to begin with, and if the standard deviation of the random number is 6, what is the standard deviation of the amount of plankton that will be in the tank afterwards

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