If you put in z to the equation

you get

and that equals 9 so the answer is B. 9
In inches it would be 63,360 in.
The regular price is 5 for $2.95. One can is $2.95/5 = $0.59. Three cans are $1.77. With the $1 rebate, the final price would be $0.77 for 3 cans, $0.25 per can.
82+82+82 is the awnser you'll be needing : )