Abby can buy a 7­lb. bag of dry cat food for $7.49, or she can purchase a 3­lb. bag for $5.40. Which size is the best buy?

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).

Use sigma notation to represent the following series for 9 terms.

What is the value of the discrimination for the quadratic equation 0=×2+2+×2