Convert 13542 base six to base ten. i'm in math20 at folsom lake college and i'm trying to figure out this question. i had most of the answers figured out but this one stomped me.

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?

Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.

Ineed to know how to write question one in mathematical terms