D. Both the intake valve and the exhust valve are closed.
Her monthly allowance is $30! hope this helped
To the nearest foot, it would be 23 feet. I found this using the Pythagorean Theorem of a (squared) + b (squared) = c (squared). If you have 24 as the hypotenuse, you have to square this and subtract 64 (8*8) from it. That will equal 512. So you have to find the square root of that which is 22.62, which will round to 23 feet.
There will be excactly 400 fiction books. The ratio of fiction to all is 4 to 9, or 4 to 900.
It is 15100. First 0 is no important.
