Meteorologists use the formula D3 = 684t? to describe the area covered
by violent storms, such as tornadoes and hurricanes. D is the diameter
of the storm, in kilometres, and t is the time, in hours, it will last.
a) If a storm lasts for 4 h, what is its diameter?
b) If the diameter of a hurricane is 30 km, how long will it last?

What is the value of f(x) = 2.2 for f(-2)?

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?

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?