Answer:
surface area of cube  time
 time
Step-by-step explanation:
given data
new volume =  10 time original volume
to find out
what factor surface area change
solution
we consider here side of cube is a 
and volume is V 
we consider here a is 2 
then volume will be v1 = a³ = 2³ = 8
and surface area = 6a²    = 6(2)² = 24    ..........1
so if volume increase 10 time
than 
V = 10 × v1
a³ = 10 × 8 
a³= 80
a = 2 × ∛10
and 
surface area increase here 
surface area = 6a² 
surface area = 6( 2 × ∛10 )² 
surface area = 24 ×  ............2
    ............2
so from equation 1 and 2 
surface area / surface area = 24 ×  / 24
  / 24
surface area = 
so here surface area of cube will be  time
 time
 
        
             
        
        
        
Answer:
Step-by-step explanation:
Please see this link to get answer
 
        
             
        
        
        
4(10x)
or
4×10x
im sorry if this is incorrect..i tried
        
             
        
        
        
Answer:
The required volume is 5 ml.
Step-by-step explanation:
Given : In tests for intoxication, blood alcohol levels are expressed as percentages by volume. A blood alcohol level of 0.080% by volume means 0.080 mL of ethanol per 100 mL of blood and is considered proof of intoxication. If a person's total blood volume is 5.0 L.
To find : What volume of alcohol in the blood gives a blood alcohol level of 0.100 % by volume?
Solution : 
According to question we use the formula,

The percentage of a blood alcohol level is 0.100%
The total volume of the blood is V=5L=5000 ml.
Substitute the value in the formula,




Therefore, the required volume is 5 ml.
 
        
             
        
        
        
Answer: 554
Step-by-step explanation:
If prior population proportion is known, then the formula to find the sample size is given by :-

As per given description, we have
p= 0.1
E=0.025
Critical z-value for 95% confidence : 
Then, 

Hence, the minimum sample size required = 554.