Answer:
14
Explanation:
EWAN KO LANG DIN BASTA YAN ALAM KO
 
        
             
        
        
        
Let us say that x is the cut that we will make on the
sides to make a box, therefore the new dimensions are:
l = 15 – 2x
w = 8 – 2x
It is 2x since we cut on two sides.
 
We know that volume is:
V = l w x
V = (15 – 2x) (8 – 2x) x
V = 120x – 30x^2 – 16x^2 + 4x^3
V = 120x – 46x^2 + 4x^3
 
Taking the 1st derivative:
dV/dx = 120 – 92x + 12x^2
 
Set dV/dx = 0 to get maxima:
120 – 92x + 12x^2 = 0
 
Divide by 12:
x^2 – (92/12)x + 10 = 0
(x – (92/24))^2 = -10 + (92/24)^2
x - 92/24 = ±2.17
x = 1.66, 6
We cannot have x = 6 because that will make our w
negative, so:
x = 1.66 inches
 
So the largest volume is:
V = 120x – 46x^2 + 4x^3
V = 120(1.66) – 46(1.66)^2 + 4(1.66)^3
V = 90.74 cubic inches
 
        
             
        
        
        
Answer:
A
Explanation:
houses use alternating current source
 
        
             
        
        
        
Answer:
0.5A
Explanation:
Using  ,
,
R is the resistance (in Ohms)
V is the voltage (in V)
I is the current (in A)

I = 0.5A
 
        
             
        
        
        
It depends on how much time 45 j will go, so if you told me that it went through 45 j per minute it will go through for 2 minutes so not efficient unless it went through 45 j per hour then it is efficient.