NetherisIsTheQueen
20.01.2021 •
Mathematics
Please help on question 8
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Ответ:
1500/45 = 1000/x
Cross multiply
1500x = 45000
Eliminate
1500x/1500 = 45000/1500
x = 30
Answer is 1000 liter tank empty’s in 30 min
Ответ:
Then the revenue will be the product of the cost and the number of loaves:
Revenue = (2.5 + 0.5x)(30 - 2x) = 75 + 10x - x^2
If we want to maximize revenue, we take its derivative and equate to 0:
d(Revenue)/dx = 10 - 2x = 0
x = 5
So to maximize revenue, x = 5, which corresponds to a price of (2.5 + 0.5x) = $5/loaf. This will correspond to sale of (30 - 2x) = 20 loaves. The total revenue will be ($5/loaf)*(20 loaves) = $100.