A. Use the thin lens equation to determine the image distance from the lens. Is the correct answer because I have no idea why
The dog’s speed is
A) 0.61 m/s
Electrical energy is your answer.
1 gallon = 231 cubic inches
1 cubic foot = 1728 cubic inches
(55 gal) x (231 in³/gal) x (1 ft³/1728 in³)
= (55 x 231 / 1728) ft³
= 7.352 cubic feet (rounded)