Frank’s quarter grades are 82.5, 94.7, and 87.9. what grade, rounded to the nearest percent, will frank have to earn in the last quarter to receive at least a 88% final course grade? . a.. 95%. b.. 96%. c.. 87%. d.. 91%

The given final course grade, 88%, is the average of Frank's four quarter grades. The average is the sum of all grades divided among the four quarters. Let x be the average,
                                  (82.5 + 94.7 + 87.9 + x) / 4 = 88
The value of x is equal to 86.9. Thus, the answer is letter C. 87%.