The howler monkeys at a zoo are fed a diet that contains 3.35 kcal/gram. write a function g(x) that gives the mass of food in grams that a howler monkey must eat to obtain x kilocalories of energy.

The amount of energy that the given amount of food contains is the product of the given content per grams and the amount of food in grams. 

For this item, we assume that g(x) is the total energy that the howler monkey needs to obtain and x is the amount of food in grams. From the presented concept in the first paragraph,

amount of energy = (3.35 kcal/gram) x (amount of food)
g(x) = 3.35x