josiah has a dna test done to see if he is responsible for vandalism in a nearby park. the test results are exclusive. what does this mean about josiah?
josiah was not at the crime scene.
josiah is guilty of vandalism.
josiah was present when the crime was committed.
josiah was at the crime scene, but did not commit the crime.


which of the following statements is true?
some dna tests analyze the mitochondria instead of the nucleus of a cell.
inconclusive dna test results usually means the suspect is guilty.
the most common biological evidence used in dna testing is sweat.
dna testing cannot be done on cells that have been dead for more than five years.

The answer is A, he was not at the crime scene. The results of a DNA test can be inclusive, exclusive, or inconclusive. Inclusive findings mean the DNA profiles match and the suspect was at the scene of the crime. Exclusive results mean the profiles do not match and the suspect was not at the scene of the crime. Inconclusive results cover all the findings in between inclusive and exclusive

9.9 years

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.