A calendar shop has 5,624 calendars. Each rack can hold 38 calendars. How many racks does the store need to use?

You would need 148 racks

Step-by-step explanation:

5,624 divided by 38 = 148

Your answer would be 31.5 (so 32 when rounded up)

For triangles you basically multiply them together, and the divide your answer by two. 

A= 1/2 b x h 
A= 1/2 7 x 9
A= 1/2 63
A= 31.5 (rounded up to 32)

I hope I helped and if you need more you could always ask me :)

-Dawn