Answer:
The correct option is C: Jack could increase his utility by buying more pencils and fewer pens.
Explanation:
The marginal rate of substitution or MRS is defined as the rate at which one gives up a reasonable amount of one product to exchange for another products, and still maintains the same utility level. For Jack to maintain the same level of utility, he needs to more pencil and fewer pens to maintain an equilibrium in his purchase of pens and pencils.
He believed in heliocentialism, or that the Earth was the center of the universe.
The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
This new tunnel revolutionized transportation in Europe and overcome this physical barrier because the Swiss engineers built the world's deepest and longest tunnel in the world, increasing the effectivity of train freight transportation across Europe.
We are talking about the Gotthard base tunnel, in Switzerland. According to the article "Swiss create the world's longest tunnel," was so complex to build that engineers and workers lasted 20 years to complete. It is a tunnel for trains. It has 35 miles of longitude and crosses the Alpes mountains.
Plasticity or brain plasticity refers to the brain's capacity to change throughout life. It is centered around the notion that many aspects in a person's brain can suffer alterations even through adulthood. Basically it defies the idea that we are "hard-wired" as humans. Learning is appointed as a main contributor to the increase of brain plasticity, this is largely due to the brain's capacity to form new connections (synapses) between neurons (brain cells) when presented with new scenarios, it is consistently reorganizing itself, creating and pruning (removing) synapses.
The answer to your question is
<span>folkways</span>
