Each sides are equal so the answer 400 cubic in
Answer:
a
The average cost is 
b
The standard deviation of cost is
Step-by-step explanation:
From the question we are told that




The cost of replacing the two component is C = 50 + 2 X + 4 Y
The variance of X is mathematically represented as
V(X) =
Substituting values
![V[X] = 24 - 4^2](https://tex.z-dn.net/?f=V%5BX%5D%20%3D%20%2024%20-%204%5E2)
![V[X] =8](https://tex.z-dn.net/?f=V%5BX%5D%20%3D8)
The variance of Y is mathematically represented as
V(Y) =
Substituting values
![V[Y] = 8 - 2^2](https://tex.z-dn.net/?f=V%5BY%5D%20%3D%20%208%20-%202%5E2)
![V[X] =4](https://tex.z-dn.net/?f=V%5BX%5D%20%3D4)
The average of replacing the two component is

substituting value


The variance of replacing the two component is
Note: The variance of constant is zero
and X and Y are independent
=> 
substituting values
=>
=>
=> 
The standard deviation is
substituting values
Answer: n <u>></u> 16
Step-by-step explanation:
I used a calculator and got 17.91 and because 17 is higher than 16, n is greater than or equal to 16
Half-life = elapsed time * log(2) / log (bgng amt / ending amt)
half-life = (5 *
<span>
<span>
<span>
0.3010</span></span></span>3) / log (1/.6)
half-life = (5 *
<span>
<span>
0.3010</span></span>3) / log (1/.6)
<span>half-life = 1.505 / </span>
<span>
<span>
<span>
0.221848750
</span>
</span>
</span>
half-life =
<span>
<span>
<span>
6.785 days
Location for formulas & calculator
http://www.1728.org/halflife.htm
</span></span></span>