An object is 50 cm from a converging lens with a focal length of 40 cm . a real image is formed on the other side of the lens, 250 cm from the object. what is the magnification? a)1.25b) 5.5c) 3.0d) 4.0e) 0.25

Regarding the history of the universe, which of the following is true? all the chemical elements were created during the big bang, but some have been modified since that time as a result of radioactive decay. the earth formed quickly after the big bang. all the current stars in our galaxy formed about the same time billions of years ago. key elements of which earth and life are made, including carbon, oxygen, and iron, did not exist when the universe was born and were created later in stars.