Shane bought lunch for $5.38 and a shirt for $15.95. he then used the rest of his money to buy a book. he spent a total of $38.12. how much money did shane spend on the book?

$10.57

$16.79

$22.17

$32.74

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