The answer should be
4.
First, simplify

to 4. Your problem should look like: 4 x 1.
Second, multiply. 4 x 1 = 4 so that is your answer.
Also, to start the equation up, make sure to add in the numbers in replace for the letters. Your problem to start with should look like:

.
Diameter= 18cm
Radius is half of diameter
Radius=9cm
Answer:
C would be the correct answer. :D
Answer:
the answer is B
Step-by-step explanation:
Answer:
44
282
35
421
15
507
24
15
Step-by-step explanation: