Problem: Sumer:

Although short-lived, one of the first empires known to history was that of Eannatum of Lagash, who annexed practically all of Sumer, including Kish, Uruk, Ur, and Larsa, and reduced to tribute the city-state of Umma, arch-rival of Lagash. In addition, his realm extended to parts of Elam and along the Persian Gulf. He seems to have used terror as a matter of policy. Eannatum's Stele of the Vultures depicts vultures pecking at the severed heads and other body parts of his enemies. His empire collapsed shortly after his death.

What cities flocked to Eannatum's empire?
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A: unanswerable

Problem: Nonprofit organization:

It has been mentioned that most nonprofits will never be able to match the pay of the private sector and therefore should focus their attention on benefits packages, incentives and implementing pleasurable work environments. Pleasurable work conditions are ranked as being more preferable than a high salary and implacable work. NPOs are encouraged to pay as much as they are able, and offer a low stress work environment that the employee can associate him or herself positively with. Other incentives that should be implemented are generous vacation allowances or flexible work hours.

What are other incentives that NPO emplotees can be offered instead of higher wages?
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A: generous vacation allowances or flexible work hours

Problem: Republic of the Congo:

Ethnically and linguistically the population of the Republic of the Congo is diverseEthnologue recognises 62 spoken languages in the countrybut can be grouped into three categories. The Kongo are the largest ethnic group and form roughly half of the population. The most significant subgroups of the Kongo are Laari in Brazzaville and Pool regions and Vili around Pointe-Noire and along the Atlantic coast. The second largest group are the Teke who live to the north of Brazzaville with 17% of the population. Boulangui (M'Boshi) live in the northwest and in Brazzaville and form 12% of the population. Pygmies make up 2% of Congo's population.

What amount of the Kongo are Laari?
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A: unanswerable

Problem: Antenna (radio):

Maximum power transfer requires matching the impedance of an antenna system (as seen looking into the transmission line) to the complex conjugate of the impedance of the receiver or transmitter. In the case of a transmitter, however, the desired matching impedance might not correspond to the dynamic output impedance of the transmitter as analyzed as a source impedance but rather the design value (typically 50 ohms) required for efficient and safe operation of the transmitting circuitry. The intended impedance is normally resistive but a transmitter (and some receivers) may have additional adjustments to cancel a certain amount of reactance in order to "tweak" the match. When a transmission line is used in between the antenna and the transmitter (or receiver) one generally would like an antenna system whose impedance is resistive and near the characteristic impedance of that transmission line in order to minimize the standing wave ratio (SWR) and the increase in transmission line losses it entails, in addition to supplying a good match at the transmitter or receiver itself.

What requires matching of the empedance to an antenna system?
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A:
Maximum power transfer