Answer
A) 470 kJ.
B) 18 g.
C) 130 Kcal.
D) 37 g
Work Step by Step
To answer item A, we need to multiply the amount of carbohydrate (26 grams) by the value of 17 and the amount of protein (2 grams) by the value of 17 (see table 3.7 for values); after that we need to sum the results and finally round off the final value to have the answer.
To answer item B, we must divide the value in kcal given by the question by the value of kcal / g of carbohydrates :
$\frac{72 Kcal}{4Kcal/g}$ =18 grams
To answer item C we must use the value in table 3.7 (9kcal / g) and multiply it by 14.
14g $\times$ 9kcal/g = 126 Kcal (round it off to 130 Kcal)
To answer item D, we must multiply the values in grams (13 grams of carbohydrates and 5 grams of protein) by the respective values in the table 3.7 and sum its results. After that, decrease the previous result from the value of Kcal given by the question; then, we need to divide the result (333 Kcal) by the value of 9kcal / g.
$\frac{ [405 Kcal -(13g \times 4Kcal/g + 5g \times 4Kcal/g )]}{9}$ = 37 grams
