Answer: 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.
Question:
Which coordinate grid shows Point A at (−0.25, 1.75)?
20 and 21 is your answer
20 + 21 = 41
hope this helps
Answer:
1.21
Step-by-step explanation:
The cost of the grapes is the price per pound times the number of pounds
cost = 2.42 * .5
cost = 1.21