Deandre needs a total of $380 to buy a new bicycle. he has $35 saved. he earns $15 each week delivering newspapers. how many weeks will deandre have to deliver papers to have enough money to buy the bicycle?

How can you find the conditional probability of a given b as the fraction of b’s outcomes that also belong to a, and interpret the answer in terms of the model? i just need a good explanation

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

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