The medicinal thermometer commonly used in homes can be read to ±0.1°F, whereas those in t...

The medicinal thermometer commonly used in homes can be read to ±0.1°F, whereas those in the doctor’s office may be accurate to ±0.1 °C. Percent error is often expressed as the absolute value of the difference between the true value and the experimental value, divided by the true value:

The vertical lines indicate absolute value. In degrees Celsius, express the percent error expected from each of these thermometers in measuring a person’s body temperature of 38.9°C.