7. If \[a, b\] and \[c\] are different positive integers and \[2^a.2^b.2^c = 64\], then \[2^a + 2^b + 2^c =\]
(A) 14
(B) 17
(C) 21
(D) 28
(E) 34

8. In the \[xy\]-plane, the center of a circle has coordinates (3,-7). If one endpoint of a diameter of the circle is (-2,-7), what are the coordinates of the other endpoint of this diameter?
(A) (-7,-7)
(B) (-2,-2)
(C) (3,-2)
(D) (8,-2)
(E) (8,-7)

9. A regulation for riding a certain amusement park ride requires that a child be between 30 inches and 50 inches tall. Which of the following inequalities can be used to determine whether or not a child's height \[h\] satisfies the regulation for this ride?
(A) \[|h - 10| < 50\]

(B) \[|h - 20| < 40\]

(C) \[|h - 30| < 20\]

(D) \[|h - 40| < 10\]

(E) \[|h - 45| < 5 \]

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