Does anyone know how to do this?

The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

5/6+7/8what is the answer sealsdbdbshd

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