Write the following numbers in standard form (as an ordinary number), a) 4.001 x 109
b) 6.591 x 10-7
c) 3.8 x 102
d. -7.9901 x 10-3

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.