Answer:
no diagram attached, please attach
From the edge of the circle to the center, it’s 22.5 inches.
Answer:
4,800
Step-by-step explanation:
Just multiply 800 x 6, which gets 6,800. Then, get 11,600 and subtract 6,800 from it. You'll get 4,800.
Answer:

Step-by-step explanation:
Recall the definition for the combination symbol with the use of factorial (symbol !):

Therefore, for the case where n = 12 and k = 9, we have:

For the smaller triangle ;
15^2 + b^2 = 17^2
b = 8
To check the work
15^2 + 8^2 = 289
17^2 = 289
(This is if the bottom number on the smaller triangle says 15, its a bit hard to read..)