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.

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years

Convert (-3,0) to polar form. a. (3,0’) b. (-3,180’) c. (3,180’) d. (3,360’)