The ideal weight of a nickel is 0.176 ounce. to check that there are 40 nickels in a roll, a bank weighs the roll and allows for an error of 0.015 ounce in total weight

 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

Error that was allowed in total weight = 0.015 ounce

So, Total weight will be

Hence, Total weight will be 7.055 ounces.

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)