For 0º < x < 360º, what are the solutions to sin (x/2) + cos(x) - 1 = 0?

Given the following statements, which is the best

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.