Answer:
-5 is the coefficient of b
Answer:
Step-by-step explanation:
We get to use the simple version of the half life equation:
where N is the amount of radioactive element left after a specific number of years,
N0 is the initial amount of the element,
t is the number of years (our unknown), and
H is the Half life of the element. For us,
N is 61
N0 is 70,
t is unknown,
H is 24 years. Filling in:
. We begin by dividing both sides by 70 to get:
and then take the natural log of both sides:
which allows us to bring down the exponent to the front on the right side:
. We divide both sides by ln(.5) to get:
and then multiply both sides by 24 to get:
t = 4.8 years
Observe that
8² = 64
(1/1000)² = 1/1000000 = 0.00001
8² × (1/1000)² = 64 × 0.000001 = 0.000064
Then
They will usually have a dash in the line, or the same number next to both of them.
Hope this helped!