Answer:
Total cost of Mark's board is $3.75.
Step-by-step explanation:
We are given the following in the question:
Length of wooden board =
[tex]=7\dfrac{1}{2}\text{ foot}[/tex]
Unit cost of board = $0.50 per foot
Total cost of board =
[tex]=\text{Length of board}\times \text{Unit cost of board}\\\\=7\dfrac{1}{2}\times 0.50\\\\=\dfrac{15}{2}\times \dfrac{1}{2}\\\\=\dfrac{15}{4} = 3.75\$[/tex]
Thus, total cost of Mark's board is $3.75.
