The businessman finds when he produces 10 items, his cost is $200, when he produces 20 items his cost is $250. Find his marginal cost

What is the solution to the equation 9^(x+1) =27

Equation for the calculation double 2 and then add 5

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%