Suppose a and b are 3 x 3 matrices. show that if b is obtained from a by adding 100 times the first row of a to the last row of a, then det (a) = det (b)

Henry's butcher shop uses an electronic scale that measures to 1/100 of a pound. which is the most accurate measurement based on the limitations of the scale that might be found on a package of meat sold by henry?