Answer: 0.32
Step-by-step explanation:
A) 15.20
b) 965.2
i hope this is right (^^)
Answer:
300 grapes
Step-by-step explanation:
This is done through ratios.
10 grapes:2 mg
x grapes : 60 mg
If you cross multiply, you get 300 grapes
The amount of the substance (At) at any time t is calculated through the equation,
At = (A0)(e^-kt)
where A0 is the initial amount and k is constant.
For the half-life,
ln (At / A0) = ln 0.5 = -k(5270 years)
The value of k is 1.3153x10^-4 / year.
Substituting this value to the same equation, where At = 0.25A0
ln 0.25 = -(1.3153 x 10^-4)(t)
The value of t from this equation is 10540 years. The closest value to this is letter A.
