Answer: C
Explanation:
(x+5)(x+5) = x^2 + 10x + 25
x^2 + 5x + 5x + 25 = x^2 + 10x + 25
x^2 + 10x + 25 = x^2 + 10x + 25
The answer should be y = 5x^2+4x-1
Answer:
Radius = 21 units
Volume = 9702 units³
Step-by-step explanation:
The area of the base is given by the formula ... A = πr²
so the radius is ...
r = √(A/π) = √(1386/(22/7)) = √441 = 21 . . . units
The volume is given by ...V = (1/3)Bh
where B is the area of the base, and h is the height (equal to the radius). Filling in the numbers, we have ...
V = (1/3)(1386)(21) = 9702 cubic units
The answer is B for thso question