This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.
ScanSolve AI Answer
Okay, I can show you a direct subtraction method that many find easier for these types of problems. Here are the durations for the problems using the direct subtraction method: 1. Duration from 1:20 p.m. to 2:30 p.m. Step 1: Write the end time and start time, aligning hours and minutes. c 2 hours 30 minutes \\ - 1 hour 20 minutes \\ Step 2: Subtract the minutes. Since 30 20, no borrowing is needed. 30 - 20 = 10 minutes Step 3: Subtract the hours. 2 - 1 = 1 hour Step 4: Combine the results. The duration is 1 hour 10 minutes, which is 60 + 10 = 70 minutes. The duration is 70 minutes. 2. Duration from 2:25 p.m. to 3:10 p.m. Step 1: Write the end time and start time, aligning hours and minutes. c 3 hours 10 minutes \\ - 2 hours 25 minutes \\ Step 2: Subtract the minutes. Since 10 < 25, borrow 1 hour (60 minutes) from the hours column of the end time. The end time becomes 2 hours and 10+60=70 minutes. 70 minutes - 25 minutes = 45 minutes Step 3: Subtract the hours, using the adjusted hour for the end time. 2 hours - 2 hours = 0 hours Step 4: Combine the results. The duration is 0 hours 45 minutes. The duration is 45 minutes. That's 2 down. 3 left today — send the next one.