calculate the area of a circle with radius of 2cm (use pie)

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Which inequality has a dashed boundary line when graphed ?

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?