Gomez found the masses of three rocks for science project .the first rock had a mess of 19.28 grams, the second rock had a mass of 25.3, and the third rock had a mass of 46.3. how much greater was the mass of the third rock than the combined mass of the other two rocks?

Which of the following best describes the expensive tissue hypothesis? brains require more energy, so the gut had to be reduced, and larger brains and tool use led to higher quality diets. increasing body size means that homo neanderthalensis had to include more fat in its diet. brains require more energy, so the gut had to be reduced as brains got bigger. brains require more fat, so the gastrointestinal viscera (gut) had to expand, and hands were needed to acquire more food.