7.
That depends on the size of the little boxes. If they're all 1-cubic-foot boxes, then you can fit (7 x 7 x 8) = 392 of them in there. And by the way ... 7 x 7 x 8 is not a "cube".
There are six factor pairs: 392 = 1 x 392 392 = 2 x 196 392 = 4 x 98 392 = 7 x 56 392 = 8 x 49 392 = 14 x 28
392 56 x 7 = 392
The LCM is 392.
Yes. 19.7989 is the square root of 392. But 392 is not a perfect square.
392
√392 = ~19.8
√392 ~= 19.799
The LCM of 1521 and 392 is 596232. The LCM of 15, 21 and 392 is 5880.
1/6 × 392 = 392 ÷ 6 = 65 1/3 ≈ 65.33
1358 + 392 = 1750