Answer Interest rate = 12.3%
The compound interest formula is given by:
Where
A = Future amount
P = Present amount (Principal amount)
r = Interest rate in decimal form
n = No. of times compounded per year
t = time in years.
We can say that if:
Present amount = P
Future amount = 3P
r = 12.3/100 = 0.123
n = 1
t = ?
Substitute the values in the formula of compound interest:
Taking log on both sides.
Round off to nearest option
t ≅ 9 years
 
        
             
        
        
        
Answer:
correct option is C)  2.8
Step-by-step explanation:
given data 
string vibrates form =  8 loops
in water loop formed =  10 loops
solution
we consider  mass of stone = m
string length = l 
frequency of tuning = f 
volume = v 
density of stone =  
 
case (1)  
when 8 loop form with 2 adjacent node is  
 
so here 
 ..............1
      ..............1

and we know velocity is express as
velocity = frequency × wavelength   .....................2
 =   f ×
   =   f ×  
 
here tension = mg 
so 
 =   f ×
   =   f ×  ..........................3
     ..........................3
and 
case (2)  
when 8 loop form with 2 adjacent node is  
 
 ..............4
      ..............4

when block is immersed 
equilibrium  eq will be 
Tenion + force of buoyancy = mg 
T + v ×  × g = mg
 × g = mg 
and 
T = v ×  - v ×
 - v ×  × g
 × g     
from equation 2 
f ×  = f  ×
 = f  ×  
  
 .......................5
     .......................5 
now we divide eq 5 by the eq 3 

solve irt we get 

so 
relative density 
relative density = 2.78 ≈ 2.8 
so correct option is C)  2.8
 
        
             
        
        
        
Answer: x^2 + 19
Step-by-step explanation: Cancel out x^2 and add 7 and 12 together. 7 + 12 = 19. Next plug in x^2. So, its now x^2 + 19.
Hope this help!
 
        
                    
             
        
        
        
<span>(x-7)^2 = (x-7)(x-7) = x^2 -7x -7x +49 = x^2-14x+49</span>
answer is 'x^2+14x+49'
        
             
        
        
        
B is the awser to the questioning  of this College Work