The average american is responsible for about 20,000 kilograms of carbon emission pollution each year. express this number as a single-digit integer times a power of 10

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

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?

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table