The coefficient of determination (r2) tells us a. whether r has any significance. b. the proportion of total variation that is explained. c. that we should not partition the total variation. d. that the coefficient of correlation (r) is larger than 1.

Find the sum of the first 8 terms of the following sequence. round to the nearest hundredth if necessary.

Evaluate the expression. (9 + 5)(3 + 2)0

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.