Here x² + y² = 81 with no restrictions on , so a point in the region must lie on a circle of radius 9 , center on the -axis, but it could be in any horizontal plane = k (parallel to the -plane). this the region consists of all possible circles x² + y² = 81, = k and is therefore a with radius whose axis is the -axis.
find the radius of circle.

Apolice office claims that the proportion of people wearing seat belts is less than 65%. to test this claim, a random sample of 200 drivers is taken and its determined that 126 people are wearing seat belts. the following is the setup for this hypothesis test: h0: p=0.65 ha: p< 0.65 find the p-value for this hypothesis test for a proportion and round your answer to 3 decimal places.