The answer is c because all you are doing here is subbing the variable r for 5b.
Answer:
254.34
Step-by-step explanation:
area = 
area B = 3.14 x
= 254.34
Your answer would be 2x^2. Multiplying an x by an x makes it a squared variable.
Answer:
y maximum is at 1 for both the points (4,1) and (-4,1)
Step-by-step explanation: