Answer: Total weight will be 7.055 ounces.
Step-by-step explanation:
Since we have given that
Ideal weight of a nickel = 0.176 ounce
Number of nickels in a roll = 40
Total weight becomes
[tex]40\times 0.176\\\\=7.04\ ounces[/tex]
Error that was allowed in total weight = 0.015 ounce
So, Total weight will be
[tex]Total\ weight=7.04+0.015\\\\=7.055\ ounce[/tex]
Hence, Total weight will be 7.055 ounces.