I remember doing this one and its c
I believe the correct answer would be a if it’s not remove my answer
<u>Answer:</u>
4.5 foot is needed for a unit dozen bird house
<u>Explanation:</u>
Given Tina saw ¾ foot of wooden trim is being used for first 1/6 dozen bird houses
Therefore, we can write as,4
1/6 dozen = ¾ foot
For 1 dozen bird houses, we have to use the unitary method
1/6 dozen = ¾ foot
Therefore, 1 dozen or unit dozen = 
1 dozen = ¾ * 6 =
foot = 4.5 foot
Therefore, 4.5 foot is needed for a unit dozen bird house
If you need the sum than here is an equation for it 7x3= 21
8.
48/6 = 8. hope this helps :)