There are 525 pages in a book. julia and kim round the number of pages to the nearest ten. julia says it is 520. kim says it is 53 tens. who is correct. explain your thinking.

Landon wrote that 3−2.6=4. which statement about his answer is true?

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655

Which of the following statements would be sufficient to prove that parallelograms pqrs is a rectangle ?