A set of chemistry exam scores are normally distributed with a mean of 70 points and a standard deviation
of 5 points.
What proportion of exam scores are between 68 and 73 points?
You may round your answer to four decimal places.
please help

step-by-step explanation:

5

step-by-step explanation:

she will sew have sewn five dresses   and be 1/3 done with the sixth one in an hour.

step-by-step explanation:

3/4 of an hour=45 mins

lucy makes 1 dress per 11.25 minutes

45 mins+11.25 mins=56.25 mins

60 mins- 56.25 mins=3.75 mins

3.75 mins is 1/3 of of 11.25 mins

therefore she the other 1/3 would be part of the hour and she will have sewn 5 dresses and begun the sixth.

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