Verified answer

Answer:

1. current = c, electromotive force = ef, resistance= r

c = k ef/ r

2. gasoline = g, distance = d, speed = s

g = k d

3. persons = p, slices = s

p = k s

4. volume = v, height = h, radius = r

v = k hr²

5. hours = h, men = m

h = k m