Question

Element X is a radioactive isotope such that every 38 years, its mass decreases by

Answer 1

Answer:

f(x)=890(98.68)^t-1

Step-by-step explanation:

the amount decays by 1.32% each year. So multiply by 98.68%, which is the remaining amount after 1 year.

f(x)= 890(98.68)^t-1

890 is your initial amount. Multiply that by 98.68 to get the remaining amount after 1 year. then multiply that to the power of t-1, t being the term number, or amount of years from the initial amount. You subtract by 1 because 890(98.68) is already demonstrating the amount after the first term.