In 2002, a certain town recorded 15,300 acres of undeveloped land. Each year after, the amount of land decreased by 7% due to residential and commercial development. Find the approximate amount of undeveloped land in 2013.

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.

Find the solution of each of the following.

What is the ratio of the length of an object in yards to the length of the same object in miles?