Find the average rate of change for f(x) = x2 + 7x + 10 from x = 0 to x = 2.

I’m stuck on this i don’t understand.

Charles is on a 8 1/2 mile bike ride. he stops for a rest after he’s gone 5 2/5 miles. how much farther does he still have to go?

The moats separating people from the animals are 5 m wide for lions and 4 m wide for the elephants. if the lion’s moat is 4 m deep, how deep should the elephants’ moat be?