The answer choices are
A.3/4
B.4/3
C.16/9
D.64/27

Letter B is the answer because the original ball was 3cm: 3/3(perfect) and he spend 4 seconds on making the ball bigger and every second is .25cm so 4 • .25= 1 so 1+3=4 and you are comparing to the original one so 4/3

(-14+3/2b) - (1+8/2b) = -5 -5/2b(-10+b) + (7b-5) = 8b-15(7/2b-3) - (8+6b) = -5/2b-11(5+2b) + (2b+3/2) = 4b+ 13/2