Simplify b(a + b) - a(a - b). a2 + 2ab + b2 a2 - 2ab + b2 -a2 + 2ab + b2 -a2 - 2ab - b2

Write a function that matches the description. a cosine function has a maximum of 5 and a minimum value of -5. f (r) =

Teams of 4 are competing in a 1/4 mile relay race. each runner must run the same exact distance. what is the distance each teammate runs?

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