John Schools Supplies Store sell to realize a profit of $15,000? An Industrial c

Question

John Schools Supplies Store sell to realize a profit of $15,000? An Industrial cleaning product contains 60% alcohol. If you have 8 fluid ounces of the industrial strength, how much water must be added to reduce the mixture to 30% alcohol which is recommended for household cleaning? A certain item has a linear supply curve p = 0.008n - 7 and a linear demand curve p = 5 - 0.004n, where p is the price and n is the number of items. What is the equilibrium point (p, n)? Lucreitia owns a total of 75 shares of stock, some in Apple and some in Microsoft. On a particular day, Apple closed at $25 per share and Microsoft closed at $18 per share. If Lucreitia's stock for these companies was worth $1560, how many shares of each type of stock does she own?

Explanation / Answer

3) Let x ounces of water should be added. Then,

0.60(8) + 0(x) = 0.30(8 + x)

4.8 = 0.3(8 + x)

16 = 8 + x

x = 16 - 8

x = 8

Hence,

8 ounces of water should be added.

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