Which of these statements is true regarding the use of testimony on hair samples in courts today? hair samples are replacing dna as an easily available, go-to source for identifying suspects. modern changes in the discipline mean that any police officer can provide testimony on hair samples. hair samples are necessary for most convictions. there's solid research that should lead us to be skeptical of testimony based on hair samples.

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally