The loudness, L, measured in decibels (Db), of a sound intensity, I measured in watts per square meter, is defined as L-1010g, where lo = 10-12 and is the least intense sound a human ear can hear. What is the approximate loudness of a rock

concert with a sound intensity of 10-17

O 2 Db

O 22 Db

O 60 Db

O 110 Db

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables