Answer:
C
Step-by-step explanation:
The sum of the angles on a triangle must always equal 180 degrees. That means...
40 + 60 + (2n - 10) = 180
100 - 10 + 2n = 180
90 + 2n = 180
90 - 90 + 2n = 180 - 90
2n = 90
n = 45
I hope this helps!
The population after 16 years will be 224758
C = 2 pi r
C = 2 x 3.14 x 5
C = 31.4 yd
A = pi r^2
A = 3.14 x 5^2
A = 3.14 x 25
A = 78.5 yd^2
