Answer
c. 200 g
Work Step by Step
There is a large hamburger called a quarter-pounder. This name means that a quarter-pound of beef is used to make the hamburger. We know that $1~lb \approx 0.45~kg$. We can convert the weight of a quarter-pound of beef to units of kilograms.
$\frac{1}{4}~1~lb = \frac{1~lb}{4}\times \frac{0.45~kg}{1~lb} = 0.1125~kg$
To convert from kilograms to grams, we need to move the decimal point 3 places to the right.
$0.1125~kg = 112.5~g$
If the beef weighs 112.5 grams, then it would be reasonable to estimate that the whole hamburger weighs about 200 grams.
