Question

1. mollie is making roast beef for her family dinner. she bought a 5-pound roast. the package says to cook the roast for 20 minutes per pound and to let it rest for 20 minutes before serving. what time should mollie put the roast in if her family is coming over for dinner at 6:00 p.m.?

4:30 p.m.
4:00 p.m.
3:30 p.m.
4:15 p.m.

Explanation:

Step1: Calculate cooking time

The roast is 5 pounds and cooks 20 minutes per pound. So cooking time is \( 5 \times 20 = 100 \) minutes.

Step2: Add resting time

Resting time is 20 minutes. Total time needed (cooking + resting) is \( 100 + 20 = 120 \) minutes, which is 2 hours.

Step3: Subtract total time from dinner time

Dinner is at 6:00 p.m. Subtract 2 hours: \( 6:00 - 2:00 = 4:00 \) p.m. Wait, no, wait—wait, 120 minutes is 2 hours? Wait, 100 + 20 is 120 minutes, which is 2 hours? Wait, 60 minutes is 1 hour, so 120 minutes is 2 hours. So 6:00 p.m. minus 2 hours is 4:00 p.m.? Wait, but let's check again. Wait, 5 pounds 20 minutes per pound: 520=100 minutes (1 hour 40 minutes), plus 20 minutes resting: 100+20=120 minutes (2 hours). So 6:00 p.m. minus 2 hours is 4:00 p.m. Wait, but let's re - calculate. 5 pounds *20 minutes = 100 minutes. 100 minutes is 1 hour and 40 minutes. Then add 20 minutes resting: 1 hour 40 minutes + 20 minutes = 2 hours. So 6:00 p.m. minus 2 hours is 4:00 p.m.

Answer:

B. 4:00 p.m.