That's the last one because you can factor to get
(x + 8)^2 = 36
(x + 8) = +/- 6
Answer:
30
Step-by-step explanation:
We know that BD = 20 + 5 = 25. Let's call the point where BD and CE intersect point A. Therefore, ΔBAC ≅ ΔBAE by HL (BC = BE = 25 because they are radii, BA and AB are congruent because of the reflexive property). We can use Pythagorean Theorem to find CA. We can write CA² + 20² = 25² so CA = 15 and since CA = AE = 15 and CE = CA + CE, CE = 15 + 15 = 30.
To find the volume, you just have to multiply length × width × height. The length is usually the long side, the width is usually at the side, and the height goes up and down. Hope this helped ☺