David expressed the ratio of the number of books that he owns to the number of DVDs that he owns as 27:11. Which statement could be true based upon this relationship? David has 11 books and 27 DVDs.
David has 11 DVDs and 27 books.
David has 11 DVDs and 27 items total.
David has 11 books and 27 items total.

The area of a circle is equal to 1 dm². find the radius of the circle.

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

There is a linear relationship between a salesperson sales and her weekly income. if her sales are $200 her income is $500 and if her sales are 1,200 her income is $600.what is the relationship between sales and income