3 students. Step-by-step breakdown: In Mrs. Woodward's class, there are 30 students. One-fifth have their own cell phones, meaning 6 students in total. Out of these, half are permitted to use social media, leading to a total of 3 students allowed access to social media.
(10x)^(-3)
= 1/[(10x)^3]
= 1/[10^3 * x^3]
= 1/(1000x^3)
The final result is 1/(1000x^3), and none of the given choices seem correct. (Option C would be correct if it used round brackets.)
Hope this helps~
