If f(x) = x2 + 2x + 3, what is the average rate of change of f(x) over the interval [-4, 6]?
a. 51

b. 40

c. 31

d. 20

e. 4

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?