Mrs. Johnson gave the same science unit test to all of her classes. She graded 30% of the tests, which is 45 papers. How many students does Mrs. Johnson have in her virtual class? %0D%0A%0D%0A%0D%0AA.%0D%0A13.5%0D%0A%0D%0AB.%0D%0A15%0D%0A%0D%0AC.%0D%0A60%0D%0A%0D%0AD.%0D%0A150
To find out the total number of students in Mrs. Johnson's class we need to use the proportion of 30% being equal to 45 students.
Let x be the total number of students:
30% of x = 45
0.3x = 45
x = 45 / 0.3
x = 150
Therefore, Mrs. Johnson has 150 students in her virtual class.
The answer is D. 150