Question

Kay buys 12 pounds of apples each pound costs 3$ if she gives the cashier two 20$ bills how much change should she receive

Answer 1

12lb of Apples

Every Pound is 3$

So, 12lb*3$

12*3 = 36$

Two 20$ bills is.... 20*2 = 40$

40$ - 36$ = 4$

So, she will receive $4.00 in change. 
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Answer 2

She would receive 4 dollow back becuz 3 times 12 is $36-$40