Write words to match expression (23+7)-12

18

Step-by-step explanation:

(23+7)-12

(30-12)

18

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like:

the height of the surface increases from the center out to the sides of the road

it is c!