Someone pls answer this

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.

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?

Write the percent as a fraction or mixed number in simplest form. 0.8%