Sun’s motion through spiral arms and/or the galactic disk may affect climate and even mass extinctions on earth [29,30]. (passing through higher-density regions increases the chance of encounterswith other stars or gas clouds that could send comets toward the inner solar system.) when did the sun last cross the midplane of the disk?

a and c

c is 100% but i am confused in a

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

get the total number of pieces of fruit and divide it by 4 to get the average. the result is the answer to the problem. 14 total number of fruits and there are 4 members. 14 divided by 4 is equals to 3.5.