The formula that can be used to obtain a convergent series is given by; 
 a/1 – r.
<h3>What is a series?</h3>
In mathematics, we define a series as sum of numbers which could be convergent or divergent. In a convergent series, the summation of the numbers approaches a given value.
The formula that can be used to obtain a convergent series is given by; 
 a/1 – r.
Learn more about a convergent series:brainly.com/question/15415793?
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Answer:
so maximum velocity for walk on the surface of europa is  0.950999 m/s
Explanation:
Given data 
legs of length r =  0.68 m
diameter = 3100 km
mass = 4.8×10^22 kg
to find out 
maximum velocity for walk on the surface of europa
solution
first we calculate radius that is 
radius = d/2 = 3100 /2 = 1550 km
radius = 1550 × 10³ m
so we calculate no maximum velocity that is
max velocity = √(gr)    ...............1
here r is length of leg
we know g = GM/r²   from universal gravitational law
so G we know 6.67 ×  N-m²/kg²
 N-m²/kg²
g = 6.67 ×  ( 4.8×10^22 ) / ( 1550 × 10³ )
 ( 4.8×10^22 ) / ( 1550 × 10³ ) 
g = 1.33 m/s²
now
we put all value in equation 1 
max velocity = √(1.33 × 0.68) 
max velocity = 0.950999 m/s
so maximum velocity for walk on the surface of europa is  0.950999 m/s
 
        
             
        
        
        
Answer:
Acceleration, 
Explanation:
Initial speed of the skater, u = 8.4 m/s
Final speed of the skater, v = 6.5 m/s
It hits a 5.7 m wide patch of rough ice, s = 5.7 m
We need to find the acceleration on the rough ice. The third equation of motion gives the relationship between the speed and the distance covered. Mathematically, it is given by :




So, the acceleration on the rough ice  and negative sign shows deceleration.
 and negative sign shows deceleration.
 
        
             
        
        
        
That is true Step by step:
        
                    
             
        
        
        
I believe the answer is D, only a small part of it