If the air temperature at ground level is 70F, ,the air temperature xmiles high is given by T(x)=70-19 x a)Determine the altitudes at which the air temperature is from to 41.5ºF to 22.5ºF
b)Graph the equation, label the line with the corresponding equation and explain how the numbers in the equation relate to the line.

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).