A scuba diver is 30 feet below the surface of the water 10 seconds after he entered the water and 100feet below the surface after 45seconds. What is the scuba divers average rate of change?

m = 2 ft/s

Explanation:

given,

depth of the scuba diver after 10 s, h₁ = 30 ft

depth of the scuba diver after 45 s, h₂ = 100 ft

average rate of change of the scuba diver = ?

difference of the height

   Δh = h₂ - h₁

   Δh = 100 - 30

   Δh = 70 ft

difference of the time interval

   Δt = t₂ - t₁

   Δt = 45 - 10

   Δt = 35 s

rate of change of the scuba diver

         m = 2 ft/s

average rate of change of the scuba diver is equal to 2 ft/s

a coal burning power plant

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.