Answer:

Step-by-step explanation:
So I'm assuming when you typed "log yhat=.4785 + 1.468x", you meant to write:
. And generally a logarithm can be written in the form
which can then be rewritten as
, but since the log has no base, it's assumed to be 10. So in this case you have the equation:
, which can then be written in exponential form as:

Answer:
682
Step-by-step explanation:
620, percentage decreased by - 10% (percent) of its value = 682
Answer:

Step-by-step explanation:
well the values for x are from -2 to ∞
so we can write it as

X+5=9
subtract 5 from each side
x=4