Sandra collects Barbie dolls, and of her thousands and thousands of Barbies, 40% of them aren’t blonde. If we chose Barbie dolls from Sandra’s collection at random(and return them after each selection),find the probability that it will take at least four tries to choose a Barbie doll that isn’t using a simulation

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.

Solve for x and select the correct answer

The table shows the results of a survey on students favorite kind of movie. select the appropriate values to complete the model to find the fraction of students that prefer comedy or action movie.