You are looking for a new music service. pandora
offers a plan with a membership fee of $55 and you
pay $0.50 per download. spotify offers a membership
for $35 and you pay $0.90 for each download.
a. how many songs do have to download for the
pandora and spotify to be the same? (3pts.)
b. what is the cost when they are the same? (1pt.)

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