1. What values of a, b, and c would you use in the quadratic formula for the following equation? 5x^2 +9x=4
A. a= -4, b = 9, c = 5
B. a=5, b= 9, c = -4
C. a=5, b= 4, c = 9
D. a= 5, b = 9, c=4​

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).