Atree is 4 meters tall. about how tall is the tree in feet? (1 meter is approximately 39 inches.)

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.

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?