19. three people bought books for a total cost of $12.42. if they shared the cost equally, how much did each person pay? 20. cheryl makes $8.40 an hour. if she works 10.75 hours in a week, how much did she earn for the week? you don't have to answer both at the same time. (:

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

15/16 as a decimal rounded to the nearest hundredth

Atextile fiber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms. the company wishes to test the hypothesis upper h subscript 0 baseline colon mu equals 12 against upper h subscript 1 baseline colon mu less-than 12 using a random sample of n equals 4 specimens. calculate the p-value if the observed statistic is x overbar equals 11.8. round your final answer to five decimal places (e.g. 98.76543).