Answer:
81
Step-by-step explanation:
i added it all 
 
        
             
        
        
        
Answer:
Percent means per- amount 
And the second one is dividing.
Step-by-step explanation:
 
        
             
        
        
        
Let:
Vbu= Volume of the buret
Vbk= Volume of the beaker
A buret initially contains 70.00 millimeters of a solution and a beaker initially contains 20.00 ml of the solution the buret drips solution into the Beaker. each drip contains 0.05 mL of solution, therefore:
x = Number of drips
a = volume of each drip

 after how many drips will the volume of the solution in the buret and beaker be equal ? Vbu = Vbk:
 
 
        
             
        
        
        
Answer:
VT = 50√3 , PT = 50
Step-by-step explanation:
Given 
PV = 100
With reference angle 60°
hypotenuse (h) = 100
perpendicular (p) = ?
Now 
Sin 60° = p/h
√3 / 2 = p / 100
p = √3 * 100 / 2
p = 50√3
Also 
With reference angle 30°
hypotenuse (h) = 100
perpendicular (p) = ?
sin 30° = p/h
1/2 = p / 100
p = 100 / 2
p = 50 
Hope it will help :)