Answer:
zero
Step-by-step explanation:
1/2 feet is less than 3/4 feet, so is insufficient length for even one propeller. No propellers can be cut from the board.
The first; 10.7a-8.1b
$8.75
Create a proportion where x is the cost for 7 bags:
=
Cross multiply and solve for x:
4x = 35
x = 8.75
So, the cost of 7 bags is $8.75