21,000 round to the nearest thousand

E 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks. how many possible selections of 4 books from this self include at least one paperback

A Circular clock face has a diameter of 7 inches what is the area of the clock face? round the nearest 10 a. 38.5 Square inch. B. 11 Square inch c. 49 Square inch d. 153.9 Square inch.

Which layer of Earth includes Earth's surface?

Find the approximate surface-area-to-volume ratio of the moon. the radius of the moon is 1,080 miles.

Colby wants to set sqaure tiles on the top of a box the top of the box is a rectangle 71/2 inches long and 51/2 inches wide how many 1/2 inch tiles would he need to cover the top

Based on Rudy's baseball statistics, the probability that he will pitch a curveball is 1/4. if rudy throws 20 pitches, how many pitxhes most likely will be curveballs?

If 7 cups of flour are needed to make a cake for 9 people, how many cups are needed to make a cake for 15 people?

In jim class 5 times many students take the bus as those who walk. a total of 24 students walk or take the bus. how many more students take the bus than walk to school?

Rowena is making a birthday cake for her Mother. The cake is square and each side is 16 inches. How big is the cake if she stacks 5 more cake squares on top?

F (x) = x^2-2x+2 (a) express f in standard form.