College students living off-campus frequently consume large amounts of ramen noodles and boxed macaroni and cheese. when they finish school and start their careers, their consumption of both goods frequently declines. this suggests that ramen noodles and boxed macaroni and cheese are:

substitute goods.

Explanation:

The concept of good substitution is an important subject of the study of microeconomics and allows predictions about price behavior and demand for certain goods. In short, substitute goods may be regarded as competing goods for the same consumer. Let's say there are two goods, good A and good B, and that they are substitutes. This means that the consumer will choose to consume either good A or good B, but never both at the same time. Substitute goods are the exact opposite of complementary goods.

The most common substitute good example is beef and chicken. These goods are so substitutes that a change in the price of one of them tends to influence demand for the other good. Another example is the consumption of ramen noodles and boxed macaroni and cheese, which are often eaten by college students but are abandoned by other products once students finish school and start their careers.

it is a better alternative

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals