If 16 counters is 4/9 what is the one?

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

Me! 50 points! why does when we come home, our door is unlocked and there is grease on the door knob, me solve this , and i don't know what category this goes under

7. the area of the playing surface at the olympic stadium in beijing isof a hectare. what area will it occupy on a plan drawn to a scaleof 1: 500?