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Answer:
The chain of supermarkets must order 428.1 gallons of milk.
Step-by-step explanation:
Let's define the random variable X.
X : ''Weekly volume of sales in thousands of gallons''
X is a continuous random variable.
The probability density function for X is
when 0 < x < 1
Otherwise.
Let's denote as ''a'' to the quantity of milk for the question.
We are looking for :
a is in thousands of gallons, therefore the chain of supermarkets must order
428.1 gallons of milk in order to satisfy the question.