Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.438.43 and a standard deviation of 1.51.5. Using the empirical rule, what percentage of American women have shoe sizes that are between 6.936.93 and 9.939.93

The right solution is "68%".

Step-by-step explanation:

The empirical rule is:

According to the question,

=

=

=

= (%)

Thus the above is the right solution.

c 1 hour

step-by-step explanation:

m = 2e

m = 2 so 2 = 2e

1 = e

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8