You would rewrite in standard form and use use (h, k) to find the vertex.
The vertex is (0,7) is you ask.
I got 16,000 tubes are sold in half a day because there are 720 minutes in 12 hours, and 43,200 seconds in 720 minutes then you divide by 2.7 and get 16,000
Answer:
Assuming

Step-by-step explanation:
See Graph
Answer:
41.14
Step-by-step explanation: