Hiking up a mountain you notice that the air temperature drops 10 degrees celsius for every thousand increase in elevation write a multiplication expression to represent the decrease in temperature if you hike up the mountain 2000 meters then valuate the expression and explain its meaning.

41/17 as a decimal rounded to the nearest hundredth

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?