) If you were taking a survey of the different colors of leaves seen in September, which of the following would be an unbiased sample?

A) 100 leaves on tree branches
B) 50 fallen leaves and 50 leaves on branches
C) 100 fallen leaves collected from the ground
D) 50 fallen Oak leaves, 50 Oak leaves on branches

What is the percent of increase for a population that changed from 438,000 to 561,000

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.