Logarithms

Prior to calculators logarithms (logs) were used to multiply and divide large numbers. JohnNapier, a Scottish nobleman, invented them in 1614.
There are still uses for them today including the measuring of earthquakes, pH of a solution and decibels of sound.

Lets look at some logarithms:

   log₅ 125  =  3 can be converted to an exponential form    5³ = 125  
What is the exponential form of:

• log₇ 49  = 2?
answer
• log₃ 27  = 3?
answer
• log₅ 625  = 4?
answer
• log₁₀ 10000  = 4?
answer

next

return PCTC