The explicit formula of the function d(n) is 
<h3>How to determine the explicit formula?</h3>
The function is given as:
d(1) = 2.7
d(n) = d(n-1) x (6.1)
The above means that the function is an exponential function, and it has the following parameters:
First term, d(1) = 2.7
Common ratio, r = 6.1
The explicit formula of an exponential function is:

So, we have

Hence, the explicit formula of d(n) is 
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Answer:
0.117
Step-by-step explanation:
(-0.3)(-0.39)=0.117
Here's the solution,
=》

=》

now, let's multiply the whole equation with 4
=》

=》

=》

=》

so,
Case 1. where, 2x - 5 = 0
=》

case 2. where, 2x - 1 = 0
=》

The range refers to the area where the data points fall from the lowest to highest. Here, the lowest point is 437 and the highest is 1465. So the range is from 437 to 1465
Hope this helps