The answers is A. 60 degrees
They are essentially asking us to solve:

Solving this equation for x tells us that it will take around 80.1 years for the materials in the vault to reduce to 357 pounds.
Hello,
Here is the answer :
2x^3 + 8x .
Answer: X + X= 2x or X squared.
Step-by-step explanation:
Answer:
53.13
Step-by-step explanation:
To find the measure of an angle use an inverse trig function.
so you can take the inverse to find A
.
Use a calculator to calculate the value.
A = 53.13