Answer:

Step-by-step explanation:
Given

Required
Fill the array using doubling and halving
Question is incomplete, as the array is not given.
However, the solution is as follows:

Double 25 and half 68

Double 50 and half 34

The above is now easy to solve

To the nearest whole: 4
to the nearest hundredth: 4.2
actual answer: 4.5
So 8.34=3/4 of preset
find 4/4 of present
divide 8.34 by 3
8.34/3=2.78=1/4 of present
1/4 times 4=4/4
2.78 times 4=4/4 present=11.12
answe ris present cost $11.12
3.60 because you dived 9 \ 2.5