Question

An element is decaying according to the model given by y (x) = (1/3)^x + 7 where x is measured in days and y(x) is measured in grams. Explain the correct meaning of the 7 in this situation.
Your answer:
A. Initially, seven grams of the element were present at x = days.

B.The element is decaying at a rate of 7 grams/day.

C. After 7 days, there is 1/3 of the element remaining in grams

D. As the days continue to increase, the amount of element left approaches 7 grams.

Answer 1

Answer:

D

Step-by-step explanation:

as the days continue to increase,the amount of element approaches 7 grams because 1/3<1

so (1/3)^∞→0