Discover Questions

Would it be cool (or useful) if Google Maps can add option for a overlay of weather radar for rain? Why are some sedimentary rocks smooth and round while others are rough and jagged? If f(x,y)=x^(2)+y^(2)-2x and D is triangular region with vertices (2,0) (0,2) and (0,-2). Find absolute max and min of f on the region of D.? I've tried everything to do #4 and can't figure it out? Find the exact length of the curve. x = 8 + 3t^2
y = 8 + 2t^3
0 ≤ t ≤ 5?