Answer:
true 7/8 is a rational number
The side length is the square root of the area, so is ...
... √(25/16 ft²) = (√25)/(√16) ft = 5/4 ft
Step 1: Convert
, which is in radians into degrees. To convert it multiply by 

900/12
75
Step 2: 75 degrees isn't on the unit circle but 45 degrees and 30 degrees is. Since 45 + 30 = 75 you can use the cosine of 45 and 30 to find the exact value
cos45 = 
cos30 =
Step 3: Add the cos45 and cos30 to get cos5pi/12

Hope this helped!
437 and 250 and 422 there you goooooo
820/1 and 1,240/1
Step-by-step explanation:
Im not sure if those are correct but thats what I got for dividing 7380/9 and 9920/8 so ...