David spent a total of 2 1/2 hours working on his computer. He stood up and stretched every 15 minutes before stopping how many times did David stand up and stretch

Answer 1

To find the number of times David stood up and stretched, we need to find the total number of 15-minute intervals in 2 1/2 hours.

There are 60 minutes in 1 hour, so 2 1/2 hours is 2.5 * 60 = <<2.5*60=150>>150 minutes.

To find the number of 15-minute intervals in 150 minutes, we divide 150 by 15: 150 / 15 = <<150/15=10>>10.

Therefore, David stood up and stretched 10 times.