The wind is blowing at 10 knots. sailboat racers look for a sailing angle to the 10-knot wind that produces maximum sailing speed. in this application, (r, thetaθ) describes the sailing speed, r, in knots, at an angle thetaθ to the 10-knot wind. use this information to interpret the polar coordinates: (6.66.6,5454°).

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?