Answer:
811 buttons for Marcus, 2,028 buttons for Cody, and 1217 buttons for Dillon
Step-by-step explanation:
We can find how much Lulu gives to each person by multiplying 4,056 by each child decimal.
For further reference, I'll represent the amount she gives to Marcus with an M, the amount she gives to Cody with a C, and the amount she gives to Dillon with a D.
M = 4,056 * 0.2 = 811.2 = 811 (We must round, as you cannot have parts of a button.
C = 4,056 * 0.5 = 2,028
D = 4,056 * 0.3 = 1216.8 = 1,217