Final answer:
Jack will take approximately 9.33 minutes to complete the task of stuffing 1,000 envelopes.
Step-by-step explanation:
To find out how long it will take Jack to complete the task of stuffing 1,000 envelopes, we can use a proportion. We know that Jack can stuff 12 envelopes per minute, so we can set up the proportion:
12 envelopes / 1 minute = 112 envelopes / x minutes
Cross-multiplying, we get:
12x = 112
Dividing both sides by 12, we find that x = 112 / 12 = 9.33 minutes. Therefore, it will take Jack approximately 9.33 minutes to complete the task.