Identify biological and environmental influences on development of the prenatal brain.

Environmental influences ranging from radioactivity and stress in the outside world to drugs, chemicals, hormones, and viruses in the mother's bloodstream can affect prenatal development. Among the maternal factors known to influence the fetus are disease, age, diet, reactions associated with a certain blood component, and prolonged stress.

step-by-step explanation:

100%     = 120

1%= 120/100=   1.2

9%   = 1.2 x 9=     10.8

10.80 to the 120 to get $130.80

basic principles: federalism, separation of powers, checks and balances, judicial review, representative democracy, limited government, rule of law, individual rights and responsibilities, consent of the governed, majority rule, popular sovereignty, equal protection.