Which of these statements is not true?
a) great britain did not export any iron .
b) the production of iron in the middle ages was primarily an occupation in the cities .
c) during the middle ages more people were employed in the production of iron than in farming.
d) all of these

Eleni and analisa are driving to ms. a's wedding. eleni is going east at a rate of 50 mph and analisa is driving south at 38 mph. at what is the distance between the cars changing when eleni is 1 mile and analisa is 3/4 mile from the wedding?

Select the statement that is not true about the hubble telescope: a. it orbits above the earth, avoiding the light distortion caused by our atmosphere. b. it is mounted high on a hawaiian mountaintop to provide stable images. c. it has allowed scientists to see the formation of far-away stars and solar systems, leadin some certainty about the history of our own solar system. d. it has documented the destruction of far-away stars and galaxies, leading to some certa the theories of the life cycles of stars.

The medium that carries message signals from senders to receivers of communication is