The loudness of sound is measured in decibels in honor of alexander graham bell, inventor of the telephone. if the variation in pressure is p pounds per square inch then the loudness l in decibels is l= 20log10(121.3 p), find the variation in pressure caused by a rock band at 96 decibels.

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

Which of the following is true for the relation f(x)=2x^2+1

The ratios 3: 9, 4: 12, 5: 15, and 6: 18 are a pattern of equivalent ratios in the ratio table. which is another ratio in this pattern?