A scuba instructor wants to know the opinions of scuba divers about online scuba diving tests. She obtains a list of 900 scuba divers who have completed an online scuba diving course recently and e-mails a questionnaire to a randomly selected group of 175 of these divers. Only 54 of the questionnaires are returned. Identify the population and the sample in this study. (4 points)

The population is 175 and the sample is 54.

The population is 900 and the sample is 175.

The population is 900 and the sample is 54.

The population is 54 and the sample is 900.

The population is 175 and the sample is 900.

The circumference of a circle is 5 pi cm. what is the area of the circle?

What is the difference between regular convex and concave polygons

Someone answer asap for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =