The 10th term of an arithmetic series is 34, and the sum of the first 20 terms is 710. determine the 25th term.

S(10) = a + (n-1)d
    34 = a + 9d Eqn 1
 Sum(20) = n/2(2a +(n-1)d)
       710 = 20/2(2a + 19d) Eqn 2
Solve these two equations and find the value of a and d and put the values in the first eqn (a + (n-1)d) to find the 25th term    
*n = the term
*a = the starting number 
*d = the difference in the series for each number
      

47,04 miles

Step-by-step explanation:

you can clearly see something 20 feet away that you should be able to see from that distance. If a person can see 6 miles from a height of 25 feet, by dividing 196 by 25 we can get the following calculation

196 ÷ 25 = 7,84

Then you gan multiply

7,84 × 6 = 47,04 miles

Or equal to 75703,542 meters