A customer buys 15.78 worth of gasoline and one can of pepsi price .75. You receive a 20 bill in payment. What is the change?

20 - (15.78 + 0.75) = ?

$3.47

To determine the change, we need to subtract the total amount the customer spent from the amount they paid with the $20 bill.

First, let's calculate the total amount the customer spent. The customer spent $15.78 on gasoline and $0.75 on a can of Pepsi. We add these two amounts together:

$15.78 + $0.75 = $16.53

So, the total amount the customer spent is $16.53.

Now, we can calculate the change by subtracting the total amount spent from the payment received. The customer paid with a $20 bill, so we subtract the total amount spent from $20:

$20 - $16.53 = $3.47

Hence, the change the customer will receive is $3.47.