If the ratio of the corresponding sides of similar polygons (or the
radii of similar circles) is m:n,
then the ratio of their areas is
m
2
:n
2
. If the radius of a sphere is
multiplied by a factor of 4 to
create a larger sphere, what is the
ratio of the surface areas of the
two spheres?

Helll ! 1,400 tons of wheat of two different varieties was delivered to the silo. when processing one variety, there was 2% of waste and 3% during the processing of the second variety of wheat. after the processing, the amount of remaining wheat was 1,364 tons. how many tons of each variety of wheat was delivered to the silo?