Simplify: m^2n^-4 • 3m^-3n^2

B

Step-by-step explanation:

i say b hope this jdjdjdj

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it