How did Muslim doctors come to better understand diseases? They recorded their observations of diseases,
They used what they learned from math to treat certain diseases
O They sent physicians to other lands to learn about diseases.
O They abandoned studies by earlier physicians in favor of new approaches,

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

the graph shows the spread of railways in the 1800s.

based on the graph, the conclusion that can be drawn about germany is answer d)   by 1880, germany had more rail lines than great britain and russia.

bfnfnfnfnfj d dnfnfnfnfnfndn