Two thirds of the visitors on Monday were children. Three fourths of the children came on a school trip. The rest, 21 children, came with their families. How many people visited the Center on Monday?

Write a story that matches with the expression 42x-5 pls hurry

Math it's appreciated. (picture provided)

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