A spaceship fires a missile toward a second spaceship at 0.950c; the missile approaches the second ship at 0.750c. Describe how the ships are moving with respect to one another.

the missile approaches the second ship at 0.750c. Describe how the ships are moving with respect to one another.

Explanation:

a and c

c is 100% but i am confused in a

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.