Last year kristen read one fourth as many biographies as mysteries and eighteen more science fiction books than biographies. the number of nature books that she read was one less than the difference between the number of mysteries and the number of biographies. if kristen read four times as many science fiction books as nature books, than how many books did she read in all?

Which of the following expressions are equivalent ?

Marco is studying a type of mold that grows at a fast rate. he created the function f(x) = 345(1.30)x to model the number of mold spores per week. what does the 1.30 represent? how many mold spores are there after 4 weeks? round your answer to the nearest whole number. 1.30 represents the number of mold spores marco had at the beginning of the study; 985 mold spores 1.30 represents the number of mold spores grown in a given week; 448 mold spores 1.30 represents the 30% rate of weekly growth; 345 mold spores 1.30 represents the 30% rate of weekly growth; 985 mold spores

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?