If n(A) = 9 and n(B) = 5, where n represents the cardinal number of a set, which of the following could be true?

The graph shows the decibel measure for sounds depending on how many times as intense they are as the threshold of sound. noise in a quiet room is 500 times as intense as the threshold of sound. what is the decibel measurement for the quiet room? 20 decibels28 decibels200 decibels280 decibels

Anumber is equal to twice a smaller number plus 3. the same number is equal to twuce the sum of the smaller number and 1. how many solutions are possible for this situation

Ali was paid $75 for mowing a neighbor''s yard. this is one fourth of the amount of money she earned all summer