Asquare plot of land one mile on each edge is 640 acres. given that there are 5280 ft/mi, approximately how many feet on each edge is needed for a square, 1 acre homestead?

we know that

A square plot of land of dimensions  1 mile x 1 mile is 640 acres

5,280 ft is equal to 1 mile

so

5,280 *5,280 =27,878,400 -------> is equal to 640 acres

by proportion

Find the edge of the square plot

therefore

the answer is

hello :

70y^8 + 30y^6 = 2 ( 35 y^8 + 15y^6)

the lenght is : 35 y^8

the width is : 15y^6