Identify the domain and range of the graph

Timed*** there are 8 rows and 8 columns, or 64 squares on a chessboard. suppose you place 1 penny on row 1 column a, 2 pennies on row 1 column b, 4 pennies on row 1 column c, and so on … how many pennies are on each square? a =   b =   c = d =   e =   f = g =   h =

Find the balance at the end of 4 years if 1000 is deposited at the rate of

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).