Answer:
r = - 
Step-by-step explanation:
The common ratio r of a geometric sequence is
r =
=
= .....
Hence
r =
=
= - 
The answer is 138
Because the angle is 180 and what I did was 2 x 21 = 42 and I did 180-42 equals to 138
Answer:
the price decreased by 7.06 percent
Step-by-step explanation:
100/354x329=92.93785311
100-92.93785311=7.06
I should say that 13, 24, 14 are the next three numbers, because as you can see above the first(11) number is the third(12) number minus 1 and the fourth(23) is the second (22) plus 1 if you understand what I`m trying to say