If a and b are positive numbers, and a^3 + b^3 = 30, then the greatest possible value of a is between: Choose the correct answer:
A) 0 and 3	B) 3 and 4	C) 4 and 5	D) 5 and 7	E) 7 and 9
If a = 3.1 and b is very small, then a^3 + b^3 can equal 30.   If a &gt; 4, then a^3 + b^3 &gt; 30.   The answer is 3 and 4.
<result>B</result>
If a and b are positive numbers, and a^3 + b^3 = 30, then the greatest possible value of a is between: