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1. Without using a calculator, find the common logarithms of:

1. 10,000

   1
   2
   3
   4

2. 0.000,000,1

   -5
   -6
   -7
   -8

3. 1.0 x 10⁷

   5
   6
   7
   8

4. 1.0 x 10^-12

   -12
   -13
   -14
   -15

   2). Use a calculator to find the common logarithms of:

   1. 28,383,233

      -17.161
      17.161
      -7.453
      7.453

   2. 0.766

      -0.1158
      0.1158
      1.158
      -1.158

   3. 0.000,000,822

      -14.012
      14.012
      -6.085
      6.085

   4. 9,595 x 10⁵

      5.982
      6.982
      7.982
      8.982

   3) Solve for y:

   1. 0.852 = log y

      7.112
      -7.112
      2.344
      -2.344

   2. 2.72 = log y

      -1.51 x 10¹
      1.51 x 10¹
      5.24 x 10^-2
      5.24 x 10²

   3. -3.21 = log y

      6.17 x 10^-4
      6.17 x 10⁴
      2.09 x 10^-3
      2.09 x 10³

   4. 5.91 = ln y

      8.13 x 10^-5
      8.13 x 10⁵
      3.69 x 10^-2
      3.69 x 10²

   5. -6.01 = ln y

      2.45 x 10^-3
      2.45 x 10³
      9.77 x 10^-7
      9.77 x 10⁷