Key to the practice Midterm

Problem 1

x = 4

Problem 2

The graph will be given in class.

Problem 3

  1. k = (ln0.5)/5600

  2. About 9727 years ago

Problem 4

Vertex:  (2,4)    Focus:  (2,15/4)    Directrix:  y = 17/4

Problem 5

(x + 1)2 + (y - 3)2 = 17

Problem 6

  1. False, there is no horizontal asymptote.

  2. False, the 5% interest results in a 28% gain, while the 6% interest results in a 34% gain

  3. False,  You cannot reduce a log of a sum.