For each integer n ≥ 3, find the number of ways to color each square black or
white in an n by n grid of unit squares such that every rectangle defined by the gridlines
with an area that is a multiple of 6 contains an even number of black squares.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Plzz ! need the answer asap! 7% of 980

The equatorial radius of earth is approximately 6 × 10^3 km, while the equatorial radius of saturn is approximately 6 × 10^4 km. which of the following is true? a. the equatorial radius of saturn is approximately one hundred times that of earth. b. the equatorial radius of saturn is approximately ten times that of earth. c. the equatorial radius of earth is approximately one hundred times that of saturn. d. the equatorial radius of earth is approximately ten times that of saturn.