You would take $1.50 and multiply it by how large the area is then you would have your answer.
Answer:
A=B=C
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To find out how much money Micah had before he went to the bookstore, we can simply add 10.52 + 6.39 and we will get the answer of how much money had had before he bought the book.
$10.52 + $6.39 = $16.91
Therefore, Micah had $16.91 before he bought his book.