Please help me with this homework show me how you get it and the answer

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

What expression is equivalent to log3(x+4)

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?