a chocolate company selects 800 random packages to check their weight. It finds that 12 packages have an incorrect weight. How many packages out of 4000 should the company predict to have the incorrect weight.

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?