Final answer:
Iris earned an 86% in her course, which typically corresponds to a B letter grade and 3.0 grade points on a 4.0 grading scale.
Step-by-step explanation:
Iris earned 172 points out of 200 in her painting course, which means she earned 86% percent, equivalent to a(n) B letter grade and 3.0 grade points. The correct answer is a) 86%, B, 3.0. To calculate the percentage, you divide the points earned by the total points possible and then multiply by 100. So for Iris, (172/200) x 100 = 86%. The letter grade and grade points often correspond to a percentage range, and for many institutions, an 86% would equate to a B letter grade and 3.0 grade points on a 4.0 scale.