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Difficulty: EasyUS Customary Weight Measurements

A post office charges a flat rate of $3.00\$ 3.00 per pound to ship a certain class of package. If a customer mails a package that weighs exactly 4848 ounces, what is the total shipping cost?

  1. A
    $0.90\$ 0.90
  2. B
    $1.00\$ 1.00
  3. $9.00\$ 9.00Answer
  4. D
    $144.00\$ 144.00

Answer

$9.00\$ 9.00
To find the total shipping cost, first convert the given weight from ounces to pounds. Because there are 1616 ounces in 11 pound, you divide 4848 by 1616 to get 33 pounds. Next, multiply the weight in pounds by the shipping rate of $3.00\$ 3.00 per pound (3×3.00=9.003 \times 3.00 = 9.00). The correct total cost is $9.00\$ 9.00.

Step-by-Step Solution

1
Convert the weight of the package from ounces to pounds.
48 ounces÷16 ounces/pound=3 pounds48 \text{ ounces} \div 16 \text{ ounces/pound} = 3 \text{ pounds}
The shipping rate is given per pound, so the package weight must be calculated in pounds.
2
Calculate the total shipping cost by multiplying the weight in pounds by the rate per pound.
3 pounds×$3.00/pound=$9.003 \text{ pounds} \times \$ 3.00/\text{pound} = \$ 9.00
Total cost equals the unit rate multiplied by the total number of units.

Key Concept

US Customary Weight Measurements
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US Customary Weight Measurements

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