Answer:
2,800 Books to be the same.
Answer:

Step-by-step explanation:
To find the area of a triangle, we can use the formula of:

This formula comes from the area of a rectangle, because a triangle is half a rectangle.
Answer:
13 to 25
13:25

Step-by-step explanation:
All of these show the ratio 13/25
Hope this helps!
Answer:
y = 2/3x+2
Step-by-step explanation:
The length of that arc is (90/360)·2·π·6 = (1/4)·12·π = 3·π ≈ 9.42 units;