GWD math1-14求救

Q14:

If 10⁵⁰ – 74 is written as an integer in base 10 notation, what is the sum of the digits in that integer?

A.      424

B.      433

C.      440

D.     449

E.      467

10⁵⁰-74=9999....9926

黃色部份共有50-2

so 9*48+2+6=440

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