Answer:
vsfyvsy stop! me off do is ask if em is everything ok well if the if the if the yr
Answer:
The answer is y = 3(4)^x or answer choice C
hi,,
329.1 is the answer...
if I round off the no. nearest whole no.
then the answer is 329.
Answer:
<h3>The answer is (-34.125)</h3>
Answer:
Step-by-step explanation:
For a first order decay, fraction remaining = 0.5n where n = number of half lives elapsed.
fraction remaining = 55% = 0.55
0.55 = 0.5n
log 0.55 = n log 0.5
-0.2596 = -0.301 n
n = 0.8625 = # of half lives elapsed
0.8625 half lives x 2.5 billion years/half live = 2.16 billion years have elapsed = age of the rock
b) 0.15 = 0.5n
log 0.15 = n log 0.5
-0.824 = -0.301 n
n = 2.74 half lives
2.5 billion years/half life x 2.74 half lives = 6.85 billion years = age of rock
