Find (a) the mean, (b) the standard deviation on an examination in which grades of 70 and 88 correspond to standard scores of 0.6 and 1.4, respectively.

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.

Jane’s favorite fruit punch consists of pear, pineapple, and plum juices in the ratio 5: 2: 3. how many cups of pear juice should she use to make 20 cups of punch?

The legs of a right triangle measure 6 meters and 8 meters. what is the length of the hypotonuse.