Plz help! Everything is below!

(Brainliest and Points)

7,000. You can see on the graph that at the starting point, the number of bacteria was 3,000. 4 days (96 hours) later, the number of bacteria is at 10,000. The number of bacteria increased by 7,000 to get to 10,000.

The real answer is keeping the world healthy so we won’t die

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na