AB= 10.2 cm and Bc= 3.7 cm find the length of AC

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years

The graph of f(x) = |x| is transformed to g(x) = |x + 11| - 7. on which interval is the function decreasing?

(60 points) explain this in detail