Actually, you expend far more calories than this! The calculation above assumes that we humans are 100% efficient at doing work. This is far from true...we use less than 25% of food calories to do mechanical work. In other words, for every ten joules of energy we take in from food, we can do 2.5 joules of work and 7.5 joules becomes heat. Given this 25% efficiency, how many pushups and knee bends would you have to do to burn 1 food calorie

Let us imagine that the number of automobile accidents in a certain region are related to the regional number of registered automobiles in tens of thousands (b1), alcoholic beverage sales in $10,000 (b2), and decrease in the price of gasoline in cents (b3). furthermore, imagine that the regression formula has been calculated as: y = a + b1x1 + b2x2 + b3x3 where y = the number of automobile accidents, a = 7.5, b1 = 3.5, b2 = 4.5, and b3 = 2.5 calculate the expected number of automobile accidents for a football weekend if the region has 25,000 registered vehicles, $75,000 worth of beer is sold, and a gas war causes a 10 cent drop in a gallon of gas.