Determine the number of digits in the expansion of (2^120)(5^125) without using a calculator or computer.

and

a) Given the function f(x) = x^3 = 2x , sketch y=f(|x|).

b) Sketch g(x) = |x^2 - 1| - |x^2 - 4|

c) Sketch the region in the plane to show all points (x,y) such that |x| + |y| < or equal to 2.

Thanx guys