False because you can subtract your way out of the set of whole numbers
R = {10; 15; 20}
S = {20; 25}
R U S = {10;15; 20; 25;
Thank you for posting your question here at brainly. To answer the above question,
First calculate the Joules (work done by Alexander), divide by 4.184 to get calories and then divide by 1000 to get kilocalories or Calories.
<span>201 lbs will be 90 kgs approx. And work done will be mgh = 90 x 10 x 5220 kg.m Double that for coming down.</span>
