To find the total cost to deliver all the pieces of mail, we multiply the number of pieces of mail (1.52 x 10^10) by the cost of a stamp ($0.55):
1.52 x 10^10 * $0.55 = $8.36 x 10^9
Expressed in scientific notation, the total cost is $8.36 x 10^9.
In a given year, about 1.52 x 10^10 pieces of first-class mail are delivered in the US if each piece of Mail carries a stamp costing $0.55, what is the total cost in dollars to deliver all the pieces Write the answer in scientific notation. Express the answer to the exact decimal place
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