andrew spend 1 1/6 hours studying for his exam. he spend 1 1/2 hours studying for his history exam. how many hours did he study in all.

Aman steps out of a plane at a height of 4,000m above the ground falls 2,000m very quickly and then opens his parachute and slowly falls the remaining 2000m to the ground what height above the ground would be the best choice for a reference point

Mickey needs to cut pieces of ribbon that are each 1 meter long tie onto balloons. if he has 8 pieces of ribbon that are each 1 dekameter long. how many 1 meter pieces of ribbon can he cut

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much