X-246-c4779952vhjjj23467890865
Answer:
√a(√a + 2) a - 2√a
----------------- = -----------------
a - 4 a - 4
Step-by-step explanation:
I am assuming that by "sqrt(a)/sqrt(a)-2" you meant:
√a
----------
√a - 2
To rationalize the denom., multiply numerator and denom. of this fraction by the conjugate of √a - 2, which is √a + 2:
√a(√a + 2)
-----------------
a - 4
Volume of a sphere: V=(4/3)(pi)r^3
Radius: r=3 in
V=(4/3)(3.14)(3 in)^3
V=(4/3)(3.14)(27 in^3)
V=113.04 in^3
Answer: Third option 113.04 in^3