I can identify and use inverses to solve equations with one variable

Which exponential function has an initial value of 2? f(x) = 2(3x) f(x) = 3(2x)

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)

If a sprinkler waters 1 over 12 of a lawn in 1 over 2 hour, how much time will it take to water the entire lawn? (5 points) 10 hours 6 hours 1 over 6 hour 7 over 12 hour