What is the area of a circle with a diameter of 21 centimeters?

use 3.14 for pi

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

Which translation maps the vertex of the graph of the function f(x) = x2 onto the vertex of the function g(x) = x2 – 10x +2?

Which fraction is equal to 1hole and 2/5? a.3/5 b.75 c.57 d.73