Study the timeline. Based on the timeline, about how many years ago could the oldest mammalian organism have lived? 5 million years
200 million years
1.5 billion years
4.5 billion years
HELP FAST

The answer is the second option, 200 million years ago.

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.

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