Somewhere between "none" and "a lot". Lead is not biologically necessary, so it's up to you how much of it you use and what you use it for.
1,000
Most people in the 21st century will use about 2345678 million gallons per lifetime if they live 100 years
100 MW
To lead a horse you would use a halter and lead rope. The lead rope attaches to the halter.
It depends on the person and how much hair supplies the person uses.
You don't use lead in cooking measurements.
However much they want and can afford to buy.
It is a common myth that humans only use 10% of their brains, but in reality, we use all parts of our brain throughout our lifetime. Different tasks and activities engage different parts of the brain, so there is no fixed percentage that represents how much of our brains we use.
Demeter is often associated with agriculture and the harvest, so she would likely use tools such as a sickle or a basket the most in her lifetime. Additionally, she is also known for her connection to the earth, so she may frequently use soil or seeds in her life's work.
would you use uranium-lead radiometric dating to finnd an igneous rocks age
The myth of "You Only Use 10% of Your Brain" is not true and comes from a miss heard quote from Albert Einstein. In actual fact we use 100% of our brain
Basalt can be found under the earth. I would like to see real basalt in my lifetime.