Answer:
35
Step-by-step explanation:
Answer: 
Step-by-step explanation:
Given
Vertical distance between two helicopters is 300 ft
angle of depression is 
Suppose the distance between the helicopters is d
from the figure, we can write
The volume of a cylinder is given by the formula <em>V</em>=π<em>r</em>²<em>h</em>². In this instance, <em>r</em> is 4 and the height is 47-12 (the height of the cone at the bottom is 12 mm and the sand goes up to 47 mm on the top portion of the hourglass, including both the cone and cylinder) or 35 mm.
<em>V</em>=π(4²)(35)=560π mm³.
The volume of a cone is given by the formula <em>V</em>=1/3π<em>r</em>²<em>h</em>². In this instance, <em>r</em> is 4 and the height is 12 mm.
<em>V</em>=1/3π(4²)(12)=π(1/3)(12)(4²)=π(4)(4²)=64π mm³.
This gives a total volume of 560π+64π=624π mm³ of sand.
Since the sand goes down to the bottom at a rate of 10π mm³/second, it will take 624π/10π=62.4 seconds for the sand to all drain out.
Answer:
Omg I'm so sorry thats happening to you. Are there any problem you need help with? I'm happy to help
Step-by-step explanation:
The answer would be 1/4 as u take 25 4 times it would equal 100.
