A researcher asked 520 randomly selected people of three different age groups (teen, young adult, and adult) about their favorite music genre. The two-way table displays the distribution of the responses.

0.12

Step-by-step explanation:

the amount of teens that life country are 61. since we know this is out of 520, we divide 61 by 520 to get 0.1173. round to the nearest hundredth to get 0.12

it has changed from the width and the height.

step-by-step explanation:

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b