In a given year, about 1.52×1010 pieces of first-class mail are delivered in the U.S. 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, expressed to the exact decimal place.(1 point)

Answer 1

To find the total cost, we need to multiply the number of pieces of mail by the cost of a stamp.

Total cost = (number of pieces of mail) * (cost of a stamp)

Total cost = (1.52×1010) * ($0.55)

To multiply these numbers, we can use the properties of scientific notation:

(1.52×1010) * ($0.55) = (1.52 * 0.55) * 1010

Multiply the decimals:

(1.52 * 0.55) * 1010 = 0.836 * 1010

To express the answer in scientific notation, we need to move the decimal place to the right until we have a number between 1 and 10. In this case, we need to move it 10 places to the right:

0.836 * 1010 = 8.36 * 109

Therefore, the total cost in dollars to deliver all the pieces is 8.36 * 109 dollars.