#1 Excel tutorial on the net. This example illustrates the ISERROR function in Excel. 1. For example, Excel displays the #DIV/0! error when a formula tries to divide a number by 0. The ISERROR function checks whether a value is an error and returns TRUE or FALSE. 2. Use the IF and the ISERROR function.
Ticks are also capable of surviving winter temperatures when they are able to find a host to feed from or a warm location to hide in during the coldest weather months. Generally, adult ticks will still be a threat when temperatures hover around 45 degrees Fahrenheit.
Ideally the readings should be no more than 77Â°F (25Â°C) when the lights are on and no less than 64Â°F (18Â°C) when they are off. The optimum temperature for active metabolism in most plants' root zones is around 64Â°F (18Â°C). Ensure that your water or nutrient solution is at this temperature too.