Time of communication

Which factors influenced the growth of christianity in east africa? select all that apply. a. mansa munsa’s pilgrimage to mecca b. trade with greeks and romans c. influence of a captured syrian servant d. invasion of mali’s christian military e. caravans of christians traveling through the trans-sahara trade network

Abrief, "first-step" presentation of a work to be completed is called a

Which statement is a good description of a model? a) models are a description of nature based only on one or two variables. b) models are testable ideas but they are not very to most people. c) models are a description of nature that predicts more accurately than real events. d) models are an approximiation of a real system that omits all but most essential variables in a system.