The Q10 effect is the degree by which metabolic activity is reduced with a 10° Celsius drop in temperature. A typical Q10 value is 2, meaning that metabolic activity is halved for every 10° decrease in temperature. If a collection of cells with a Q10 value of 2 produces 10 nanograms of carbon dioxide per hour at 40° Celsius, how much would you expect them to produce in nanograms in one hour at 10° Celsius?