Most English-speaking countries use the short-scale naming system, in which a trillion is expressed as 1.000.000.000.000. Some other countries use the long-scale naming system, in which a trillion is expressed as 1.000.000.000.000.000.000.000. Express each number as a single-digit integer times a power of ten. How many times greater is the long-scale naming system than the short-scale?

Find the area of the regular hexagon if a side is 20 cm.

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?

The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?