Ori needs to use 14 stamps
Stamps worth $0.44 = 3
Calculating the total value of the stamps -
= 0.44 x 3
= 1.32.
Determining the minimum number of $0.10 stamps required -
The total value of stamps/ The stamps required
= 1.32 / 0.10
= 13.2.
Now, as the fractional value of a stamp can not be used he needs to use at least 14 $0.10 stamps to reach a total value of $1.32.
If 14 $0.10 stamps are used, then the total value of the stamps will be -
= 0.10 x 14
= 1.40,
The three $0.44 stamps he owns are not worth as much as this amount. The minimal quantity of $0.10 stamps he must use is therefore 14.
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