The answer is b
2cos x + 1 = 0
2 cos x = -1
cos x = -1/2
x = cos^1(-1/2)
(cos inverse (-1/2))
x = 120°
Answer:
About 21.457 years
Step-by-step explanation:
You can solve this by setting up a simple equation.


log base 1.04 2.32=x
years
Hope this helps!
I believe it is the last one y>-1