Why were many of the machines that sped up production and travel invented during the 18th and 19th centuries?
a. rulers were finally funding scientific research.
b. there was finally a need for scientific discoveries.
c. actually, most of them were produced during the 17th century.
d. there was a heightened interest in science during this time.

The right answer for the question that is being asked and shown above is that: "c. Actually, most of them were produced during the 17th century." Many of the machines that sped up production and travel invented during the 18th and 19th centuries because it c. Actually, most of them were produced during the 17th century.

Ithink it’s letter a if i’m not wrong .

Remember soh-cah-toasoh: cah: toa: now, looking at the picture we can see that we have an angle, the hypotenuse and want to find the value of the adjacent side to the angle. so we use cah to find the adjacent angle. plug in what we have: we need to solve for x now so we get it by itself on one side: plug this into your calculator and you'll find that: