50 points find the specified vector or scalar. show your work. u = -4i + 1j and v = 4i + 1j; find |u+v|.

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

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

Can someone check if i did this correct. it’s number 4 if you’re wondering.