You can also calculate the cost of driving from Cincinnati, OH to Detroit, MI based on current local fuel prices and an estimate of your car's best gas mileage. If you're meeting a friend, you might be interested in finding the city that is halfway between Cincinnati, OH and Detroit, MI.
Cocoa beans contain caffeine, so the higher the percentage of cocoa in a chocolate bar, the higher its caffeine content. Likewise for coffee: Ounce for ounce, the more diluted the coffee drink, the less caffeine.
Cocoa powder contains caffeine. Depending on the degree of fermentation and the type of cocoa beans, the caffeine content will vary from 0.1-0.5%. In cocoa powders made from well fermented African cocoa beans the caffeine proportion is in general very low: 0.1% or less.