26 Which equation represents the circle shown in the graph below that passes through the point (0,-1)?

27 Which task is not a component of an
observational study?

(1) The researcher decides who will make up the sample.

(2) The researcher analyzes the data received from the sample.

(3) The researcher gathers data from the sample, using surveys
or

taking measurements.

(4) The researcher divides the sample into two groups, with one

group acting as a control group.

**Part II**

28 Solve algebraically for x: 16 ^{2x + 3} = 64^{x +
2}

29 Find, to the *nearest tenth of a degree*,
the angle whose measure is 2.5 radians.

30 For a given set of rectangles, the length
is inversely proportional to the width. In one of these
rectangles, the length is 12 and the width is 6. For this set of
rectangles, calculate the width of a

rectangle whose length is 9.

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