Mary ran the 5-kilometer race in 45 minutes. Melanie ran the 2-kilometer ace in 17 minutes. Who ran the faster race? What was the rate per hour?

The diameter of a circular chip is doubled to use in a new board game. the area of the new chip will be

Which expression is equivalent to -12(3x-3/4)

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