For the nonextreme weather months a company charges 10 plus 4747 cents per kllowatt-hour for customers using 1300 kWh and plus 2788 cents per kWh above 1300 for customers using mote than 1300 kWh Complete paits (a)(c). Write the function that gives the monthly charge in dollars as a function of the kilowatt-hours used.

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).