What is an equation for 2,0 and -2,2

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

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