Jean is 25 years older than her daughter charlotte. in ten years, jean will be twice charlotte's age. how old are jean and charlotte?

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x

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.