1/4 times (10/3 times 6) subtracted by 3

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?

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%

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)