Who was the 40 president

Ronald Regan

Explanation:

originally an American actor and politician, became the 40th President of the United States serving from 1981 to 1989. His term saw a restoration of prosperity at home, with the goal of achieving “peace through strength” abroad.

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b