8. Sebastian tosses three coins. What is the probability he tosses two heads and one tail?

Match each expression with its simplified form.

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters