Which of the following choices best fits the Amendments that extended voting rights in America? a. The 1st Amendment, 3rd Amendment, 6th Amendment, 9th Amendment
b. The 13th Amendment, 14th Amendment, 16th Amendment, 23rd Amendment
c. The 15th Amendment, 19th Amendment, 24th Amendment, 26th Amendment
d. The 19th Amendment, the 24th Amendment, 10th Amendment, 7th Amendment

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.