Question

Exponential function question

Answer 1

Answer:  $y = 850(0.943)^t$

Reason:

The exponential of the form $y = a*b^x$ has 'a' as the initial term and b as the growth or decay factor.

a = 850 is the starting amount

b = 1 + r = 1 + (-0.057) = 0.943 is the decay factor

If the sample loses 5.7% of its mass each year, then it keeps the remaining 94.3% of it.