Given the expression 250( 1 2 ) 1000 2000 , which number is a factor? a) 1000 b) 2000 c) 250 d) 2

David and alton are training for a race. they spend 35 minutes stretching and then go on a 5 mile practice run. david runs at a pace of 7 min/mile. alton runs at a pace of 8 min/mile. write an equation for each runner that shows the total length of their workout. then solve each equation showing your work