Find 8−1.9 . write your answer as a decimal.

Pls the last one and it has to be like number 6

Solve 13 + w/7= -18 (w/7 is a fraction)

Given a normal distribution with µ =50 and σ =4, what is the probability that 5% of the values are less than what x values? between what two x values (symmetrically distributed around the mean) are 95 % of the values? instructions: show all your work as to how you have reached your answer. don’t simply state the results. show graphs where necessary.