Answer:
400cm²
Step-by-step explanation:
The line needs to be 8.06 m long
Explanation
Given that the ladder is 7 feet tall and the bottom of the slide should be 4 m away from the ladder.
The ladder,slide and the ground connecting them makes the sides of a right angled triangle with ladder as the height and ground as the base.
base=4m
height=7m
hypotenuse can be determined using pythagoras law

Answer:
i believe the first one
Step-by-step explanation:
Cosine is

which applies to a right triangle. I hope that helps you.