The parking charges at a shopping center were $2 for the first hour and $d for every hour or part of an hour after that. calvin parked his car at the shopping center from 2: 30 p. m. to 5: 10 p. m. how much did he have to pay for parking?

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