Answer:
the answer is 8 oz
Step-by-step explanation:
well it says for the first ounce is $0.49 so $0.49 is your first number, then you're trying to figure out how many $.21
2.then to make this easier you subtract $0.49 from $1.96 and that's is $1.47
3.then all you need to do is divide $1.47 By .21 cents anand you should get 7 .
4.but don't forget the $0.49 for the first ounce ,then 1 ounce add it to the 7 and It will equal 8 oz in total
The weight of the letter is 8 ounces.
The cost of mailing a letter is a function of the fixed cost and the variable cost. The fixed cost is the cost of the first ounce. This is $0.49. The variable cost is the cost that varies with the additional ounce. This is $0.21 per ounce.
The total cost of mailing a letter = $0.49 + $0.21x
Where x is the cost of additional ounces.
$1.96 = $0.49 + $0.21x
Combine similar terms
$1.96 - $0.49 = $0.21x
$1.47 = $0.21x
Divide both sides of the equation by 0.21
x = $1.47 / 0.21
x = 7 ounces.
The total ounces = 7 + 1 = 8 ounces
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