Please help
A.
Plastic bags are made from oil. About 12 million barrels of oil’s are used to make the 1 billion plastic bags used in the United States each year. If oil is $65 per barrel, how much is spent to make plastic bags each year?
B.
Calculate the quantity of oil saved if 25% less bags were produced

ans.

dna fingerprinting is defined as a process that determines the dna characteristics of an individual. these dna characteristics are unique among individuals as their fingerprints, so it is known as dna fingerprinting.

steps of dna fingerprinting includes extraction of dna from sample, amplification of dna, restriction digestion of amplified dna, and then analysis of dna by gel electrophoresis, respectively.

thus, the next step performed by the scientist is 'to cut the amplified dna (obtained by polymerase chain reaction) by restriction enzymes that cleave the dna into fragments and their analysis.'