Your answer is B) 2c^3 because since they are both cubed, the subtract normally.
The fruit that must be equal would have to be the one that has the same number as 2 or more fruits
K(-1+1.01)+0.03=-2.45-1.81k
0.01k+1.81k=-0.03-2.45
1.82k=-2.42
k=-2.45\1.82=1.3