Oscar worked 40 hours last week. He had $160 deducted from his earnings for taxes. If he had $480 left after the deduction, how much does Oscar earn per hour ?

To determine the number of deer in a forest a forest ranger tags 280 and releases them back

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

Annabelle's homework is 75% it took her three hours how long should she estimate it will take her to complete her homework.