mr ong bought a total of 156 pens and pencils. the ratio of number of pens to the number of pencils he bought was 4:9. each pen cost 2 dollars. how much did mr ong pay for the pens​

Can you decompose the numbers 20,740,6,000

What is the solution of log2  (3x  -  7)  =  3? 4 5

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.