Petra 6

Petra sold an item for 4000 and made a 40% profit. What was the cost price of the product?

Correct answer:

a =  2857.14

Step-by-step explanation:

b=4000 r=40%=10040=52=0.4  a + r a = b a(1+r)=b  a=1+rb=1+0.44000=2857.14



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