大家帮我看看这道题吧，我怎么都觉得是选D啊？? 

26 In the figure shown, the circle has center O and radius 50, and point P has coordinates (50,0).  If point Q (not shown) is on the circle, what is the length of line segment PQ ?

(1)     The x-coordinate of point Q is – 30.

(2)     The y-coordinate of point Q is – 40.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

Q29:

The toll for crossing a certain bridge is $0.75 each crossing.  Drivers who frequently use the bridge may instead purchase a sticker each month for $13.00 and then pay only $0.30 each crossing during that month.  If a particular driver will cross the bridge twice on each of x days next month and will not cross the bridge on any other day, what is the least value of x for which this driver can save money by using the sticker?

  A.     14

B.     15

C.     16

D.     28

E.      29

答案是，我觉得题目看得有点晕了，大家帮我看看吧，谢谢啦

Q29:

The toll for crossing a certain bridge is $0.75 each crossing.  Drivers who frequently use the bridge may instead purchase a sticker each month for $13.00 and then pay only $0.30 each crossing during that month.  If a particular driver will cross the bridge twice on each of x days next month and will not cross the bridge on any other day, what is the least value of x for which this driver can save money by using the sticker?

  A.     14

B.     15

C.     16

D.     28

E.      29

答案是，我觉得题目看得有点晕了，大家帮我看看吧，谢谢啦

Q29:

The toll for crossing a certain bridge is $0.75 each crossing.  Drivers who frequently use the bridge may instead purchase a sticker each month for $13.00 and then pay only $0.30 each crossing during that month.  If a particular driver will cross the bridge twice on each of x days next month and will not cross the bridge on any other day, what is the least value of x for which this driver can save money by using the sticker?

  A.     14

B.     15

C.     16

D.     28

E.      29

答案是，我觉得题目看得有点晕了，大家帮我看看吧，谢谢啦

Q26 A Q在圆周上，已知X坐标的话不管Q在2或3区间，PQ的长都是40倍的根号5；若已知Y

坐标，则Q在3、4区间，PQ长度不唯一

Q29 B 即0.75*2X-(13+2X*0.3)>0,X>14.4，X的最小整数取值为15