A 10-foot ladder is placed against a building so that the ladder makes a 78º angle with the ground. To the nearest tenth of a foot, at what height does the ladder touch the building?
A) 10.2 feet
B) 7.8 feet
C) 9.8 feet
D) 16.2 feet
+2668 Using trig, you have a triangle with a hypotenuse of 10, and an angle of 78. Doing \(10 \times \sin(78) = o\)
Solving, we find that it is 9.8 meters, or \(\color{brown}\boxed{\text C}\)
