If 30 sixth graders own birds, how many sixth graders were surveyed?

600 students surveyed

Step-by-step explanation:

30 / 5%

30 / 0.05 = 600

42

Step-by-step explanation:

Step 1 :

Given 6 lifts is equal to 5 zooms in the land of feather

Need to find the the number of lifts equal to 35 zooms/

Step 2 :

Let x represent the number of lifts which is equal to 35 zooms

Lift and zoom are in direct proportion to each other given by

6 lift =  5 zooms

So we  have,

6 lifts : 5 zooms :: x lifts : 35 zooms

This gives

6 lifts/5 zooms = x lifts / 35 zooms

x lifts  = 6 lifts * 35 zooms / 5 zooms

=> x = 42

So 42 lifts are equal to 35 zooms