Final answer:
To find the number of students who passed Mrs. Coomer's math class, multiply 85% by the total number of students in her class.
Step-by-step explanation:
To find the number of students who passed Mrs. Coomer's math class, we need to calculate 85% of the total number of students in her class. So, 85% of 40 is calculated as:
85% × 40 = 0.85 × 40 = 34
Therefore, 34 students passed Mrs. Coomer's math class.