Geometry problems. not understanding.

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

Describe the relationship between the angles of similar triangles and the sides of similar triangles

What is the volume of a cone with a height of 6 cm in the radius of 2 cm