It should be 12×18. 1:3 means you take where it's at, at 1 and multiply it's size by 3.
We are given with the formula
p = 200k - 500
a) The constraint for this formula is obtained from the idea that the profit must be positive
200k - 500 > 0
k > 500/200
k > 2.5
b) To make 14000 profit
14000 = 200k - 500
k = 72.5 or 73 knives must be sold
chocolate: experimental 100 theoretical 165
vanilla: experimental 100 theoretical 135
Mint chip: experimental 100 theoretical 100
banana:experimental 100 theoretical 30
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answer for this question 22 if f(5)