If (3+√5)(4-√5)=a+b√5, where a and b are integers, then what is the value of a + b?
1 answer:
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Given:
The postal service charges $10.30 per pound on the package shipped to England.
To find:
The rate in dollars per ounce.
Solution:
We know that,
1 pound = 16 ounce
1 Dollar per pound = dollar per ounce.
1 Dollar per pound = 0.0625 dollar per ounce.
We have, the postal service charges $10.30 per pound on the package shipped to England.
Using the above conversion, we get
$10.30 Dollar per pound = dollar per ounce
$10.30 Dollar per pound = dollar per ounce
Therefore, the required rate is $0.64375 per ounce.