The average cost of an irs form 1040 tax filing at thetis tax service is $150.00. assuming a normal distribution, if 90 percent of the filings cost less than $172.00, what is the standard deviation? hint: use excel or appendix c-2 to find the z-score. (

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.

gmt is 4 hrs ahead of edt so just add four hours to 1: 14: 20 (minutes and seconds stay the same)

gmt is 5: 14: 20

hope this !

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