Atriangle oab is formed where o is the centre of a cricle of radius 12cm, and a and b are endpoints of a 15cm chord. find the angle subtended at the centre of the circle, in degrees and minutes

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

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.