Step 1 :Given that Australia is approximately 2555 miles in width, we can convert this to kilometers using the conversion factor \(1 \mathrm{~km}=0.6214 \mathrm{mi}\). This gives us \( \frac{2555}{0.6214} \approx 4111.68 \) kilometers.
Step 2 :Angela bought 8 bottles of soda for a party, each bottle was 2 liters, giving a total of \(8 \times 2 = 16\) liters. We can convert this to gallons using the conversion factor \(1 \mathrm{~gallon} = 3.785 \mathrm{~liters}\). This gives us \( \frac{16}{3.785} \approx 4.23 \) gallons.
Step 3 :Camille was in a 3000 meter race. We can convert this to miles using the conversion factor \(1 \mathrm{~mi}=1609.24 \mathrm{~m}\). This gives us \( \frac{3000}{1609.24} \approx 1.86 \) miles.
Step 4 :A nutritional label says that a serving of mac and cheese is 121 grams. We can convert this to ounces using the conversion factor \(1 \mathrm{~oz}=28.35 \mathrm{~g}\). This gives us \( \frac{121}{28.35} \approx 4.27 \) ounces.
Step 5 :\(\boxed{\text{Final Answer:}}\) Australia is approximately \(\boxed{4111.68}\) kilometers wide. Angela bought \(\boxed{4.23}\) gallons of soda. The race was \(\boxed{1.86}\) miles long. A serving of mac and cheese is \(\boxed{4.27}\) ounces.