How long is the arc intersected by a central angle of pi/2 radians in a circle with a radius of 4.5 cm

Which of the following best describes the delian problem?

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?

Solve the equation: x - 9 = -6 + 5 a. 21 b. 7 c. 14 d. 2