Final answer:
By dividing 119 calories by 28.4 grams, we get the caloric density of the cereal, which is 4.19 calories/gram. Multiplying this number by 42.6 grams gives us approximately 178.554 calories in that amount of cereal.
Step-by-step explanation:
To find out how many calories are in 42.6 grams of crispy rice cereal when it's known that there are 119 calories in 28.4 grams, we first calculate the number of calories per gram by taking the total calories and dividing it by the weight in grams:
119 calories ÷ 28.4 grams = 4.19 calories/gram.
Next, we calculate the calories in 42.6 grams using the calories per gram:
42.6 grams × 4.19 calories/gram = 178.554 calories.
Therefore, there are approximately 178.554 calories in 42.6 grams of crispy rice cereal.