Serena leans a 24-foot ladder against a 22.8-foot-tall building to climb on the roof.

Answer:
Sine of the Angle = opposite / hypotenuse
Sine Angle = 22.8 / 24
Sine Angle = .95
Angle = arc sine (.95)
Angle = 71.805 degrees
Angle = 71.8 (rounded)
Step-by-step explanation: