The thermometer hanging on Jessica's patio reads 18°C on a cool autumn day. The temperature on Jessica's patio in Fahrenheit is °F

We are to convert the temperature that Jessica was able to read on a cool autumn day from °C to °F. To solve this, we need to recall the formula in converting temperature from °C to °F and this is shown below:

F = (9/5) C + 32, Jessica reads 18°C and substitute this to C in the formula such as:

F = (9/5) 18 + 32

F = 32.4 + 32, perform addition of 32.4 and 32

F = 62.4 °F

The answer is 62.4 °F.