Betty glacier is a manufacturer's representative for a plastics company. she travels all over the country selling her company's products. her total monthly expenses for august, september, and october were $2,756.11, $7,111.20, and $5,080.70. what was her average monthly expenditure?

The temperature of a chemical solution is originally 21 ? c . a chemist heats the solution at a constant rate, and the temperature of the solution 75 ? c after 1212 12 minutes of heating. the temperature, tt t , of the solution in ? c is a function of x , the heating time in minutes. write the function's formula.