X/1 would equal -2- square root of 11 and x2 would equal -2 plus square root of 11
I believe it's 37CM, I had that question on my finals last year.
I suspect 4/2 should actually be 4/3, since 4/2 = 2, while 4/3 would make V the volume of a sphere with radius r. But I'll stick with what's given:
In Mathematica, you can check this result via
D[4/2*Pi*r^3, r]
Answer:
it says round to the nearest 10th so it wouldn't be 81, it would be 81.8%
Mathematics can be tricky so precise definitions are important. Without them there can be confusion which more often then not will generate a wrong answer. With clear precise definitions it is easier to understand the topic. Therefore, it is easier to get the correct answer.
