How did descartes and kepler contribute to the new scientific thinking?
a. they showed how mathematics and measurement could be used in scientific investigation.
b. they proved that science and mathematics were two separate areas of study.
c. they determined that scientists had to study mathematics before they could study anything else.
d. they proved that it was impossible to use mathematics in astronomy.

The correct answer is A.

Johannes Kepler enunciated mathematical laws to explain planetary orbits. He studied the solar system and created the laws of planetary motion, known as Kepler's three laws.

René Descartes in the seventeenth century inaugurated the philosophy known as rationalism, it means that knowledge comes from reason. He affirmed that it is necessary to use the mathematics to understand, decipher and control the world because it is a set of quantifiable trajectories.

i believe that the correct answer is a canadian hero.

explanation: he is celebrated as a national hero in canada for successfully thwarting a united states takeover of canada during the war of 1812.

the crusaders are identified in the painting;

c. by the red crosses on their backs