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Convert the following units: 21 ounces to g, 0.03 pounds to kg, and 8 ounces to kg.

Mathematics

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Here are the conversions and calculations:

Conversion Factors Used:

  • 1 kg=2.20462 pounds1 \text{ kg} = 2.20462 \text{ pounds}
  • 1 pound=0.453592 kg1 \text{ pound} = 0.453592 \text{ kg}
  • 1 ounce (oz)=28.3495 g1 \text{ ounce (oz)} = 28.3495 \text{ g}
  • 1 g=0.035274 ounces1 \text{ g} = 0.035274 \text{ ounces}
  • 1 pound=16 ounces1 \text{ pound} = 16 \text{ ounces}
  • 1 ton (US short ton)=2000 pounds1 \text{ ton (US short ton)} = 2000 \text{ pounds}
  • 1 kg=1000 g1 \text{ kg} = 1000 \text{ g}

1. Convert the following:

  • 1.3: 21 ounces to g
  1. Use the conversion factor 1 ounce=28.3495 g1 \text{ ounce} = 28.3495 \text{ g}.

    $$
    21 \text{ ounces} \times \frac{28.3495 \text{ g}}{1 \text{ ounce}}
    $$
    
  2. Calculate the value.

    $$
    21 \times 28.3495 = 595.3395 \text{ g}
    $$
    The conversion is: $\boxed{\text{595.3395 g}}$
    
    • 1.4: 0.03 pounds to kg
  3. Use the conversion factor 1 pound=0.453592 kg1 \text{ pound} = 0.453592 \text{ kg}.

    $$
    0.03 \text{ pounds} \times \frac{0.453592 \text{ kg}}{1 \text{ pound}}
    $$
    
  4. Calculate the value.

    $$
    0.03 \times 0.453592 = 0.01360776 \text{ kg}
    $$
    The conversion is: $\boxed{\text{0.0136 kg}}$
    
    • 1.5: 8 ounces to kg
  5. Convert ounces to grams using 1 ounce=28.3495 g1 \text{ ounce} = 28.3495 \text{ g}.

    $$
    8 \text{ ounces} \times \frac{28.3495 \text{ g}}{1 \text{ ounce}} = 226.796 \text{ g}
    $$
    
  6. Convert grams to kg using 1 kg=1000 g1 \text{ kg} = 1000 \text{ g}.

    $$
    226.796 \text{ g} \times \frac{1 \text{ kg}}{1000 \text{ g}} = 0.226796 \text{ kg}
    $$
    The conversion is: $\boxed{\text{0.2268 kg}}$
    
    • 1.6: 2 pounds to g
  7. Convert pounds to kg using 1 pound=0.453592 kg1 \text{ pound} = 0.453592 \text{ kg}.

    $$
    2 \text{ pounds} \times \frac{0.453592 \text{ kg}}{1 \text{ pound}} = 0.907184 \text{ kg}
    $$
    
  8. Convert kg to g using 1 kg=1000 g1 \text{ kg} = 1000 \text{ g}.

    $$
    0.907184 \text{ kg} \times \frac{1000 \text{ g}}{1 \text{ kg}} = 907.184 \text{ g}
    $$
    The conversion is: $\boxed{\text{907.184 g}}$
    
    • 1.7: 99.32 kg to ounces
  9. Convert kg to pounds using 1 kg=2.20462 pounds1 \text{ kg} = 2.20462 \text{ pounds}.

    $$
    99.32 \text{ kg} \times \frac{2.20462 \text{ pounds}}{1 \text{ kg}} = 218.9609 \text{ pounds}
    $$
    
  10. Convert pounds to ounces using 1 pound=16 ounces1 \text{ pound} = 16 \text{ ounces}.

    $$
    218.9609 \text{ pounds} \times \frac{16 \text{ ounces}}{1 \text{ pound}} = 3503.3744 \text{ ounces}
    $$
    The conversion is: $\boxed{\text{3503.3744 ounces}}$
    
    • 1.8: 818.7 g to pounds
  11. Convert g to kg using 1 kg=1000 g1 \text{ kg} = 1000 \text{ g}.

    $$
    818.7 \text{ g} \times \frac{1 \text{ kg}}{1000 \text{ g}} = 0.8187 \text{ kg}
    $$
    
  12. Convert kg to pounds using 1 kg=2.20462 pounds1 \text{ kg} = 2.20462 \text{ pounds}.

    $$
    0.8187 \text{ kg} \times \frac{2.20462 \text{ pounds}}{1 \text{ kg}} = 1.80492 \text{ pounds}
    $$
    The conversion is: $\boxed{\text{1.8049 pounds}}$
    

    2. A crane can lift a maximum load of 3.5 tons. If a container weighs 6 820 pounds, will the crane be able to lift the container?

  13. Convert the crane's maximum load from tons to pounds using 1 ton=2000 pounds1 \text{ ton} = 2000 \text{ pounds}.

    Crane capacity=3.5 tons×2000 pounds1 ton=7000 pounds\text{Crane capacity} = 3.5 \text{ tons} \times \frac{2000 \text{ pounds}}{1 \text{ ton}} = 7000 \text{ pounds}
  14. Compare the crane's capacity with the container's weight.

    Crane capacity: 7000 pounds7000 \text{ pounds}
    Container weight: 6820 pounds6820 \text{ pounds}
    Since 7000 pounds>6820 pounds7000 \text{ pounds} > 6820 \text{ pounds}, the crane can lift the container.

    The crane will be able to lift the container: Yes\boxed{\text{Yes}}

    3. Calculate the cost of 0.25 pounds of gold, if gold costs R13 070.58 per ounce.

  15. Convert 0.25 pounds to ounces using 1 pound=16 ounces1 \text{ pound} = 16 \text{ ounces}.

    Gold in ounces=0.25 pounds×16 ounces1 pound=4 ounces\text{Gold in ounces} = 0.25 \text{ pounds} \times \frac{16 \text{ ounces}}{1 \text{ pound}} = 4 \text{ ounces}
  16. Calculate the total cost.

    Total cost=4 ounces×R13070.58/ounce=R52282.32\text{Total cost} = 4 \text{ ounces} \times \text{R}13070.58/\text{ounce} = \text{R}52282.32

    The cost of 0.25 pounds of gold is: R52282.32\boxed{\text{R}52282.32}

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