So base in your given that the function P(-d<z<d)=0.5408, the ask is to find the value of D by standard normal distribution. Base on my calculation and analyzing the equation the possible answer to this question is D=0.2704, i hope you are satisfied with my answer and feel free to ask for more
It's 50 because 3 is half of 6
It depends x cant equal zero unless your teacher says it can which most of the time it cant so therefore no it cant.
From largest to smallest:
3 hundreds (300) , 6 tens (60) , 8 ones (8)
hope this helped :)