Solve exponential equations using logarithms: base-10 and base-e

Solve exponential equations that have 10 or e at the base of the exponential term.
You might need: Calculator


Consider the equation minus, 16, dot, 10, start superscript, space, 6, x, end superscript, equals, minus, 80.
Solve the equation for x. Express the solution as a logarithm in base-10.
x, equals
Approximate the value of x. Round your answer to the nearest thousandth.
x, approximately equals
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4