1. Find the coordinates of the center and the measure of the radius for a circle whose equation is
(x-8) + (y + 4) = 12

Please help

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)

You have 138.72 in your saving account u take out 45.23 and 18.00 you deposit 75.85 into your account