Answer:
its the same answer 56.78
Step-by-step explanation:
20 x 42= 840
So the area would be 840 mm^2.
Answer:
29.24 grams
Step-by-step explanation:
It is given that,
Rachel's chocolate bar is 43% cocoa
The weight of the chocolate bar is 68 grams
We need to find how many grams of cocoa does it contain. It means it will contain 43% of 68 grams. It can be solved as follows :

Hence, it will have 29.24 grams of cocoa.
100 to 49. Because area is units squared, and it is finding by multiplying the side lengths, you would simply square the ratio.