I keep forgeting this. would someone remind what is 1/2 is in decimal form please?

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

How is the equation of this circle written in standard form? x2 + y2 - 6x + 14y = 142 a) (x - 3)2 + (y + 7)2 = 200 b) (x+ 3)2 + (y - 7)2 = 200 (x - 6)2 + (y + 14)2 = 142 d) (x+6)2 + (y- 14)2 = 142

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if