15/16 should be the right answer b/c 1/4= 4/16
Answer:
1600
Step-by-step explanation:
1600 is the answer because
321×5 = 1605 so estimation = 1605
This is one of those questions where, if you know the formula, it's easy,
and of you don't know the formula, there's no way.
In fact, the whole purpose of the question is to help you remember the formula.
The volume of a cylinder is
(pi) x (the radius)² x (the height).
For this particular cylinder, that's
(pi) x (3)² x (10) =
(pi) x (9) x (10) = 90 pi cubic units.
If you use (3.14) for (pi), then that's <em>282.6 cubic units</em>.
It would take her 45 mins to grade 2 stacks or 3/4 of an hour.
