Select the correct answer.

At Jonathan's school, there are 30 seventh graders participating in the school play. Of the students in the seventh grade, 60% are not participating in the school play. How many seventh graders at Jonathan's school are not participating in the school play?
A.
75
B.
60
C.
45
D.
20

The number of seventh graders not participating in the school play is 60% of the total number of seventh graders:

0.60 x 30 = 18

Therefore, the answer is C. 45 seventh graders are not participating in the school play.

To find the number of seventh graders who are not participating in the school play, we need to calculate 60% of the total number of seventh graders.

Step 1: Multiply 60% by the total number of seventh graders.
60% of 30 = (60/100) * 30 = 0.6 * 30 = 18

So, there are 18 seventh graders who are not participating in the school play.

Therefore, the correct answer is:
C. 45