A first-class letter can weigh up to 13 ounces before additional charges must be added. Estimate how much more weight can be added to a letter that weighs 10 1/
a lot actually but stop ASKING solve on your own
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ANSWER -- 2 1/2
once is enough, especially when you include typos!
To estimate how much more weight can be added to a letter that weighs 10 1/2 ounces, we need to subtract the current weight of the letter from the maximum weight allowed for a first-class letter.
The maximum weight allowed for a first-class letter is 13 ounces.
To find out how much more weight can be added, we subtract the current weight of the letter (10 1/2 ounces) from the maximum weight allowed (13 ounces):
13 ounces - 10 1/2 ounces = 2 1/2 ounces
Therefore, you can add approximately 2 1/2 ounces more to the letter before additional charges must be added.