If there are 150 nails to a pound and you want to order 10% extra for a job that you estimate would require 3000 nails, how many pounds will you need?

To determine how many pounds of nails are needed when ordering an extra 10% for a job that requires 3000 nails, you first need to calculate the total number of nails required including the extra.

Starting with the base requirement of 3000 nails, you apply the 10% extra:

1. Calculate 10% of 3000 nails:

10% of 3000 = 0.10 × 3000 = 300 nails.

2. Add the extra nails to the base requirement:

3000 nails + 300 nails = 3300 nails.

Next, convert the total number of nails into pounds, knowing that there are 150 nails per pound:

1. Divide the total number of nails (3300) by the number of nails per pound (150):

3300 nails ÷ 150 nails/pound = 22 pounds.

This calculation confirms that you will need 22 pounds of nails for the job, which makes the answer correct.