Let $\mathcal{H}$ be the hyperbola with foci at $(\pm 5, 0)$ and vertices at $(\pm 3, 0),$ and let $\mathcal{C}$ be the circle with center $(0,0)$ and radius $4.$ Given that $\mathcal{H}$ and $\mathcal{C}$ intersect at four points, what is the area of the quadrilateral formed by the four points?

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).

Janice determined there were 10 possible outcomes when tossing two coins and spinning a spinner numbered 1 through 6. what is the correct number? what might have been janice's error?

Write the percent as a fraction or mixed number in simplest form. 0.8%