Professor Garrison measured the composition of metals in a sample. The sample contained 3.89 kilograms of copper, 0.64 kilograms of nickel, and 7.6 kilograms of iron. How many kilograms was Professor Garrison's sample?

kilograms

To find out how many kilograms Professor Garrison's sample was, we need to add up the weights of copper, nickel, and iron.

The weight of copper is 3.89 kilograms.
The weight of nickel is 0.64 kilograms.
The weight of iron is 7.6 kilograms.

Adding these weights together: 3.89 + 0.64 + 7.6 = 12.13 kilograms.

So, Professor Garrison's sample weighed 12.13 kilograms.

To find out how many kilograms Professor Garrison's sample was, we need to add the weights of copper, nickel, and iron.

Copper: 3.89 kilograms
Nickel: 0.64 kilograms
Iron: 7.6 kilograms

To find the total weight, we add these three quantities:

Total weight = 3.89 kilograms + 0.64 kilograms + 7.6 kilograms

Total weight = 12.13 kilograms

Therefore, Professor Garrison's sample weighed 12.13 kilograms.

To find out how many kilograms Professor Garrison's sample weighed, we need to sum up the weights of copper, nickel, and iron.

Copper weight = 3.89 kilograms
Nickel weight = 0.64 kilograms
Iron weight = 7.6 kilograms

Adding up these weights:
3.89 + 0.64 + 7.6 = 12.13 kilograms

Therefore, Professor Garrison's sample weighed 12.13 kilograms.