Can someone explain to me why might someone keep lookin at you?

Aplus trig, question find the measure of angle a 5.1 8.2

Want fre points & brainliest? answer this drivers ed question correctly and i got you : ) where do you not need to look before you change lanes or pass another vehicle? a. out your window toward your target lane b. in your rearview mirror at cars behind you c. over your shoulder, at your blind spot d. inside the vehicle you plan on passing

How do astronomers measure the amount of dark matter in the universe