How to find the least common multiple of 56 and 12 using prime factorization?

Need solving this second acceleration problem.

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Will make ! for correct answer the dot plot below shows the number of toys 21 shops sold in an hour.is the median or the mean a better center for this data and why? a. median; because the data is not symmetric and there are outliersb. median; because the data is symmetric and there are no outliersc. mean; because the data is symmetric and there are no outliersd. mean; because the data is skewed and there are outliers