Aball is thrown from a height of 43 meters with an initial downward velocity of 4 m/s. the ball's height h (in meters) after t seconds is given by the following. h=43-4t-5t^2 how long after the ball is thrown does it hit the ground?

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).