Answer:
21/100 = .21 = 21%
Step-by-step explanation:
Answer:
64
Step-by-step explanation:
256^3/4 =( 4^4)^3/4=4^3=64
The answer is C, as it is rounded to 2 decimal places / 3 significant figures, which is more than the others.
Answer:
Supply will decrease at the rate of 29 CDs per week.
Step-by-step explanation:
The number of retro portable CD players prepared to supply to a retail outlet every week is represented by the formula
q = 0.1p² + 9p
Here p = price offered
price it offers decreases at a rate of $1 per week.
In other words, 
Now we differentiate the given equation

![\frac{dq}{dt}=[0.1(2p)+9]\frac{dp}{dt}](https://tex.z-dn.net/?f=%5Cfrac%7Bdq%7D%7Bdt%7D%3D%5B0.1%282p%29%2B9%5D%5Cfrac%7Bdp%7D%7Bdt%7D)
Since, 
![\frac{dq}{dt}=(-1)[0.1(2p)+9]](https://tex.z-dn.net/?f=%5Cfrac%7Bdq%7D%7Bdt%7D%3D%28-1%29%5B0.1%282p%29%2B9%5D)
For p = 100,
![\frac{dq}{dt}=(-1)[(0.1\times 200)+9]](https://tex.z-dn.net/?f=%5Cfrac%7Bdq%7D%7Bdt%7D%3D%28-1%29%5B%280.1%5Ctimes%20200%29%2B9%5D)
= (-1)[20+9]
= -29
Therefore, 
Supply will decrease at the rate the rate of 29 CDs per week.