Dustydevils company manufactures and sells a line of sewing machines. demand per period (q) for a particular model is given by the following relationship: q = 800 − .5p where p is price. total costs (including a "normal" return to the owners) of producing q units per period are: tc = 15,000 + 70q + 4q2

Ineed the answer to question 1 , i’m desperate

This is the number of complete movements of a wave per second.

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.