Timmy is building a new website. Right after he starts, he has 2 visitors. He expects his visitors to increase according to a model he developed for
his other websites' growth, v(t) = 10t + b, where b is the number of
visitors right after he starts building his website, t is the time since he
started building his website in weeks, and v(t) is the number of total
visitors after t weeks.

How many visitors does he get 4 weeks after starting to build his
website?

How many new visitors does he get per week?