Physics is not my strongest subject(possibly my weakest), so any sort of explanation with a formula to find the answers to number 5 would help me out so much
That or I suck at physics and just made up the answers.
Can you explain how you got each answer please?
I think for the extra credit, although 1/2 the speed of light is further reduced to 1/4, it's still going at an incredibly fast rate that the length would still be shortened to a lesser extent, but idk, I feel that there's some formula behind the extra credit question that would perfectly answer the question
thanks for the formulas but is this supposed to answer for number 5?
Read the wiki, the real length from Earth to the star (which is Lo) is 4.3 light years but the length we measure is observed from the moving spaceship (which is L) so according to the formula
5a) L (relative length) =Lo (real length) * (1 - 0.896^2) = 1.909 light year
5c) The real time is just simple. To= Lo/v = 4.3/0.896 = 4.79910714286 years = 4.799 years
Read the wiki, the real length from Earth to the star (which is Lo) is 4.3 light years but the length we measure is observed from the moving spaceship (which is L) so according to the formula
I'd appreciate it if anyone wanted to help me with the extra credit question too
thanks for the formulas but is this supposed to answer for number 5? 
(1 - 0.896^2) = 1.909 light year