Carregando…
Exemplo 6.46 de Prealgebra, 6.5 Solve Proportions and their Applications
Solve Proportions and their Applications: exemplo 6.46
Problema e solução em inglês, como no livro original.
One brand of microwave popcorn has calories per serving. A whole bag of this popcorn has servings. How many calories are in a whole bag of this microwave popcorn?
Resolva no papel primeiro. Depois abra a solução um passo de cada vez e pare assim que conseguir terminar sozinho.
Solução
Identify what you are asked to find. How many calories are in a whole bag of microwave popcorn? Choose a variable to represent it. Let number of calories. Write a sentence that gives the information to find it. If there are 120 calories per serving, how many calories are in a whole bag with 3.5 servings? Translate into a proportion. Substitute given values. Multiply both sides by 3.5. Multiply. Check if the answer is reasonable. Yes. Since 3.5 is between 3 and 4, the total calories should be between 360 (3⋅120) and 480 (4⋅120). Write a complete sentence. The whole bag of microwave popcorn has 420 calories.
Sua vez
O Try It do livro logo depois deste exemplo: mesma ideia, outros números. Só a resposta é dada.
Marissa loves the Caramel Macchiato at the coffee shop. The oz. medium size has calories. How many calories will she get if she drinks the large oz. size?
Como foi?