The sum of the k for k=1 to k="n"=(n*(n+1))/2 , where "n" is the total integer.
In this problem n = 200
Sum = (200*201)/2 = 20,100
Answer: option C is correct
Step-by-step explanation:
Answer: 2 hours and 27 minutes
The answer is
B
The answer must have a positive twenty so you can rule out A and C.
That leaves us with D
D has just 6x. The x has to be 3x times 4 and 6x times 5, which comes out to 42x, proving D wrong and leaving you with B