The function $C$ models the number of customers that are in a store $t$ hours after the store opened on a certain day.

$t$	$0$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$	$11$	$12$
$C(t)$	$0$	$30$	$50$	$67$	$86$	$98$	$99$	$97$	$86$	$69$	$52$	$28$	$0$

1. $C(3)=$
2. Interpret the meaning of $C(3)$:
   A. In $3$ hours since the store opened, there were a total of $67$ customers.
   B. There were $67$ customers in the store $3$ hours after the store opened.
   C. In $3$ hours since the store opened, the store had an average of $67$ customers per hour.
   D. There were $3$ customers in the store $67$ hours after the store opened.
3. Solve $C(t)=86$ for $t$. Use commas to separate your answers if there are more than one solution. $t=$
4. Interpret the meaning of Part c’s solution(s):
   A. There were $86$ customers in the store $4$ hours after the store opened.
   B. There were $86$ customers in the store either $4$ hours after the store opened, or $8$ hours after the store opened.
   C. There were $86$ customers in the store $8$ hours after the store opened.
   D. There were $86$ customers in the store $4$ hours after the store opened, and again $8$ hours after the store opened.