Answer:
The length of the inclined plane AC = x = 8.6 ft
Step-by-step explanation:
Height = AB = 5 ft
BC = 7 ft
Now length of inclined plane AC = x
Apply pythagores theorem for ΔABC
[tex]AC^{2} = AB^{2} + BC^{2} \\\\x^{2} = 5^{2} + 7^{2} \\[/tex]
[tex]x^{2} = 74[/tex]
x = 8.6 ft
Therefore the length of the inclined plane AC = x = 8.6 ft