The water-ski model is a type of sdlc in which each phase of the process flows from the information gained in the previous phase, with multiple opportunities to return to previous phases and make adjustments. true or false?

1of the following choices, which one best describes one way that christianity came to east africa? a. christians traveled in caravans through the sahara desert and introduced the people of mali to a new religion. b. christian traders from the mediterranean interacted with the people of axum. c. christian military from west africa traveled across the continent to bring their religion to the people of east africa. d. christian rulers from asia traveled to east africa to bring their religion to the people. 2 which trade item from outside the region did west africans need most? a. gold b. camels c. salt d. iron

The idea of a progressive income tax, which is still a standard taxing policy in the u.s. today, was aggressively sought by the populist party. select the best answer from the choices provided true or false

This refers to weather and atmospheric conditions measured over a long period of time.