3.75 for 25 because its 6.66666 instead of 7.14
Working Formula:
V = s^3
Given:
dV/dt = -4 cubic meters per minute
V = 125 cubic meters
Required: ds/dt (rate of change of edge per minute) at V = 125 m^3
Solution:
Differentiate, equation below
V = s^3
dV/dt = 3*s^2 (ds/dt)
-4 = 3*s^2 (ds/dt)
ds/dt = -1.33/s^2 -----------> eq. (1)
V = s^3
(125)^0.33 = (s^3)^0.33
s = 5 ------------> eq. (2)
Substitute eq. (2) to eq. (1), we get
ds/dt = -1.33/(5)^2 = -0.053 meters per minute
<em>ANSWER: -0.053 meters per minute</em>
20/12
= (12+ 8)/12
= 12/12+ 8/12
= 1+ (8/4)/ (12/4)
= 1+ 2/3
= 1 2/3
20/12 as a mixed number is 1 2/3~
So, the ration is 17:3, you know that. Therefore, the change from # of students to the 17 is the same change as # teachers to 3. Knowing this, you also know that the total # of people ihas the same change as the total ratio. So 17+3 = 20. 740/20 = 37. So the change is 37. 3x37= 111 17x37=629
You can check to make sure this answer is correct by adding the two final numbers. 111+629 = 740. (Some find it easier to see lined up really pretty)
17 -- 3 total 20
x -- y total 740
Or, if you are visual, look at the picture I drew:
Answer:
find out yourself you lazy bum
Step-by-step explanation: