To get an average score of 80% (out of four exams), a total of 4*80%=320% is needed, so the minimum required for the 4th test is 320-(75+97+60)=88.
To get an average score of 89% (out of four exams), a total of 4*89%=356% is needed, so the maximum required for the 4th test is 356-(75+97+60)=124, which is impossible.
So the next exam grade must range between 88 and 100 to get a grade b in the class.
Hoped I help! Mark brainly it would help<3
The cell membrane<span> is selectively permeable to ions and organic molecules and controls the movement of substances in and out of </span>cells. The basic function<span> of the </span>cell membrane<span> is to protect the </span>cell<span> from its surroundings.</span>
It depends on the quality of the balls. It also depends on where you are buying them. Do you have any more details?
B and c are similar to eachother
