Final answer:
To find the amount of cocoa in a 79 g chocolate bar that is 41% cocoa, multiply 79 g by 0.41, which equals 32.39 g. Round this number to the tenth place, which results in 32.4 g of cocoa.
Step-by-step explanation:
The question relates to mathematics, specifically to the subject of percentages and mass. To find how many grams of cocoa are in Greg's chocolate bar, we need to calculate 41% of the bar's total weight, which is given as 79 g.
Performing the calculation, we multiply the total weight by the percentage of cocoa, which is 0.41 (41% as a decimal). This gives us:
79 g × 0.41 = 32.39 g
However, since the measurement of 35.5 g is given to the tenth place, we also must round our final answer to the tenth place for consistency. Therefore, the amount of cocoa in Greg's chocolate bar, rounded to the nearest tenth, is:
32.4 g of cocoa.