A school has 840 pupils and 40 teachers. Find the ratio of the number of pupils to the number of teachers.
Give your ratio in the form n : 1.

Solve the equation by completing the square. x^2+2x=17

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function.a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.

How does the graph of y = 3x compare to the graph of y = 3-x?