A star with a parallax angle of 0.39" (arcsecond) is what distance away? Give your answer in units of parsecs.

Determine the maximum r-value of the polar equation r =3+3 cos 0

Could we see a galaxy that is 20 billion light-years away?

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?