Bottled water in a certain vending machine costs $1.50. this price is a markup from the wholesale cost of $0.20. what is the markup as a percent?

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