On the first saturday of every month, a local amusement park allows children under the age of 12 to ride for free. which of these children can ride for free: jamie (12 years), su (11 years, 9 months), katalin (12 years, 3 months), devon (13 years, 2 months)?

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee,f, for a single job is a function of the number,t, of hours it takes him to complete the job. write the function's formula.