Question

Which exponential is equivalent to the logarithmic equation below? log 987 = a

a-987^10=a
b-a^10=987
c-10^a=987
d-987^a=10

Answer 1

A logarithmic function without a subscript means that it must be log base 10.

`\log_(10)987=a`

When learning about logarithms, a textbook/teacher provides their students with the following general equations

`\log_yx=z`

`y^z=x`

Hopefully you are familiar with this. Using the equations that I just showed, we can change the equation
`\log_(10)987=a` to
`10^a=987`

This would make answer choice C correct.