A family eats at a resturaunt. The bill is $75. The family leaves a tip and spends $87 total. What percentage tip did they leave?

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

How many square centimeters of wrapping paper will be used to wrap the shoe box?

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25