Answer:
-1
Step-by-step explanation:
Distribute
6x - 2 >= 4x - 6
2x >= -4
x >= -2
16 ride tickets.
The original entry fee is $4 so you can subtract that from 12. Now you have $8. So you would double 8 since $0.50 is half of $1. 8x2 is 16.
36; 351; 66; 1,017; 113,331; 1,968; 537; 417; 3,813
. Plugging in 4.7 for your radius, we get 
, which is roughly 29.453π≈92.530.