Answer:
60
Step-by-step explanation:
60+60+y=180 (angle sum property )
120+y=180
y=180-120
y=60
OMGGGGG I remmeber this :,) But sadly I failed math so sorry :((
≈ 14.3 hours
The mean is calculated as
mean = = = ≈ 14.3 ( to nearest tenth )