The selling price of an item is $650 it is marked down by 10%, but this sale price is still marked up from the cost of $450 find the markup from cost to sale price.

Which fraction below is equivalent to 10/12?

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52

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