How do I solve this inequality?

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.

Given abcd ac=38 and ae=3x+4 find the value of x

Write the equations in logarithmic form 7^3=343