Twice the product of m and a decreased by the square of the sum of m and n
Which of the following is an expression for the
statement above?
A) 2mn-(m? +n?)
B) 2mn-(m+n)?
C) (m+n)2 – 2mn
D) (m? +n?)-2mn

How are 3-d printers useful in studying evolution? a. to color the fossils of organisms b. to create clones of extinct organisms c. to create replicas of fossils d. to prepare paper cutouts of organisms e. to study the composition of fossils