Answer:
See below in bold.
Step-by-step explanation:
cos 150 = - cos(180 - 150)
= - cos 30
= -√3/2.
sin 150
= sin (180 - 150
= sin 30
= 1/2.
87.4 people per square mile
Answer:
5.
Step-by-step explanation:
9y - 6 + 51 = 90
9y + 45 = 90
9y = 45
y = 5.
