Respuesta :

15 , 20 , 30 , 40 , 45 , 60 .... so if he can do 45 jumping jacks in 60 seconds (1 min) then 2 mins would be 45+45 which is 90 jumping jacks. Alex can do 90 jumping jacks in 2 minutes
bink3
He can do 150 jumping jacks



Sorry if it’s wrong :(