It involved knots in strings called quipu. The quipu was not a calculator, rather it was a storage device. Remember that the Incas had no written records and so the quipu played a major role in the administration of the Inca empire since it allowed numerical information to be kept.
B it is very acidic is the answer
I want to see how the temperature of water affects the speed of rusting. What is the Independent Variable?
The Independent Variable is the temperature of water.