At the beginning of an experiment, there are 600 grams of contaminants. each hour, half of the contaminants are filtered out. how many grams of contaminants remain after 4 hours?

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d?

Type the correct answer in each box. use numerals instead of words. the average number of subscribers to an online magazine each year from 2010 to 2015 is given in the table below. the average number of subscribers to the online magazine in 2010 was the percent increase in the average number of subscribers in 2011 to the average number of subscribers in 2012 was %. the maximum average number of subscribers to the online magazine in the years shown was