2 feet below the ground level at the place where he started.
Step-by-step explanation:
After he adds 12 feet of elevation to the 6 feet above ground level where he launched, Mr Burnam is 6+12 = 18 feet above the ground level where he launched.
If he descends 20 feet, he will be 18 -20 = -2 feet above the ground level where he launched. That is, he is 2 feet below the ground level where he launched. We hope the ground slopes downward somewhat so Mr Burnam is not buried in the ground at that point.
To this mixture we're adding ounces of water, so that the new mix has a total volume of ounces and matches the composition of the coffee Lily likes. This means it would consist of
ounces of water
ounces of cocoa (same amount of cocoa as before because pure water is being added)
Solve for :
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Just to confirm: the new mixture consists of
ounces of water
ounces of cocoa
giving a total volume of ounces of coffee, and , as required.
The answer is $162 you take the prices of what she bought and add them together which is $73+$38+$64=$180 then you subtract the $180 from $342 which is $342-$180=$162 so the answer is $162