Answer:
Step-by-step explanation:
l=√(4²+7²)
=√(16+49)
=√(65)
≈8.1 ft
wall is perpendicular to base and ladder is hypotenuse.
applying pythagoras's theorem.
c=8.1
a^2+b^2=c^2
7^2+4^2=c^2
49+16=c^2
[tex]\sqrt{65}[/tex]=[tex]\sqrt{c^2}[/tex]
8.06=c
or 8.1
