To answer this question using a graphing calculator, we can proceed as follows:
1. We can graph the function:
[tex]f(x)=-(\frac{1}{2})^{-x}[/tex]
2. Then we need to find, using the graph, the corresponding value for x for which y = -70.
Therefore, we have the graph of the function as follows:
And we can see that an approximate value for x, for which we have a value for y = -70 is, approximately:
Therefore, the value for the approximated solution for the equation is x = 6.129, if we round the value to the nearest thousandth.
We can check if this value is near
