The linear function y=-0.6x+45 models the percentage of men in a certain city, y, smoking cigarettes x years after 1985. Find the slope for the model. Then describe what this means in terms of the rate of change of male smokers in this city over time. m=?
The value of the function ? (increased or decreased) by ? per year after 1985.

1. the following set of data represents the number of waiting times in minutes from a random sample of 30 customers waiting for service at a department store. 4 5 7 10 11 11 12 12 13 15 15 17 17 17 17 17 18 20 20 21 22 22 23 24 25 27 27 31 31 32 a. determine the number of classes and class interval.

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

Acircle has a circumference of 7.850 units. what is its radius?