Answer:
90/23
Step-by-step explanation:
First, you want to start in the parentheses. 5-6=-1, then multiply it by -2. Since a negative multiplied by a negative is a positive, -2*-1=2. -3^2=-9. 2+8=10. Then -9 times 10= -90. Then, we move on to the bottom. 5--2=7. 4^2=16, and -2(2)=-4. So -5(7) + 16-4=-23. Now, the equation should look like this, -90/-23. Put the negatives together and you get 90/23. 
 
        
             
        
        
        
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:
8+4=12 
sooo
3x12=36
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
c. One sided t-test
Step-by-step explanation:
One sided t test because we want to compare two means and alternative hypothesis is directional.
 
        
             
        
        
        
Answer:
Step-by-step explanation:
S