SUPER EASY WILL GIVE BRAINLIEST!! How can a cool red giant be more luminous than a warmer main-sequence star?
a.) The red giant will be more luminous if it is smaller than the main sequence star.
b.) The red giant will be more luminous if it is bigger than the main sequence star.
c.) Cool red giants are always more luminous than a warmer main-sequence star because they give off more energy.
c.) It is not possible for a cool red giant to be more luminous than a warmer main-sequence star.

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?