In the formula a(t) = a0ekt, a(t) is the amount of radioactive material remaining from an initial amount a0 at a given time t and k is a negative constant determined by the nature of the material. a certain radioactive isotope decays at a rate of 0.1% annually. determine the half-life of this isotope, to the nearest year.

 693 years

Step-by-step explanation:

Expression for rate law for first order kinetics is given by:

k = rate constant

t = time taken for decomposition = 1

= Initial amount of the reactant

= amount of the reactant left =

for half life :

Putting in the values , we get

Thus half life of this isotope, to the nearest year is 693.

so the possibilities of the measurement of the side of the triangle are either it is longest side or not the longest side

when it is the longest side

s < 25 + 35s < 60

if it is not the longest side

35 < 25 + s10 < sso 10 < s < 60so the perimeter70 < p < 130