A regular polygon is drawn in a circle so that each vertex is on the circle and is connected to the center by a radius. Each of
the central angles has a measure of 40°. How many sides does the polygon have?
8
9
10
12

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).

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Joanie wrote a letter that was 1 1/4 pages long. katie wrote a letter that was 3/4 page shorter then joagies letter. how long was katies letter