Jackies pet emporium has 40 birds 30 dogs and twice as many cats as birds. what percent of the animals were dogs.

I’m really confused and need to learn this

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

Given abc find the values of x and y. in your final answer, include all of your calculations.