What is the area of the shaded part of the circle? you don't have to explain if you don't want to.

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?

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

Solve for x and select the correct answer