QuestionWhat scores does Harold need on his fourth test to average between 70 and 79? Use interval notation for your answer.

Studdy Solution
Calculate the range of scores on the fourth test.
$$Score\, on\, fourth\, test = (70 \\times4 -259,79 \\times4 -259) = (21,57)$$The range of scores on the fourth test that will give Harold a 'C' for the semester is between21 and57, inclusive.