Mathematics, 11.12.2019 01:31 rosefoley18

The us postal rates for a first class letter are
$0.46 for up to and including 1 ounce
$0.66 for 1 to 2 including 2 ounces
$0.86 for 2 to 3 including 3 ounces
$1.06 for 3 to 3.5 including 3.5 ounces
(b) what is the cost for a letter weighing 1 ounces?

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The us postal rates for a first class letter are
$0.46 for up to and including 1 ounce
$...