Answer: -5
Step-by-step explanation:
Here's the formula for exponential decay:

(where A = new amount, p = principal (starting) amount, k = rate of decay, and t = time)
Let's use what we know and fill in the expression.

And now we solve for t.
Answer:
x=35
Step-by-step explanation:
Answer:
240 to 60 or in simpler form 1 and 4
Step-by-step explanation: