At the end of 2012, u. s. households and nonprofit organizations held approximately in mutual funds

$15.7 trillion

Explanation:

At the end of 2012 Us house holds and non profit organization held together 15.7 trillion dollars in mutual funds, mutual funds are sums of money that people or organizations put together in order to buy or to invest in other stocks, they are commonly managed by a portfolio manager. So this means that households and non profits have a large sum of the total funds that exist in the American economy.

answer; correct answer is investing activity;

b. a single paragraph.

a paragraph is a series of sentences that are organized and make sense, and are all related to a single topic . almost every piece of writing you do that is longer than a few sentences should be organized into paragraphs. this is because paragraphs show a reader where the subdivisions of an essay begin and end, and thus the reader see the organization of the essay into subjects in order to be able to understand its main points.