sat og test1 section7 q8+q10

sat og test1 section7 q8+q10
sat og test1 section7
8:In an election 2.8 million votes were cast and each vote was for either Candidate I or CandidateII.Candidate I received 28,000 more votes than CandidateII.What percent of the 2.8 million votes were cast for Candidate
A.50.05% B.50.1% C.50.5% D.51% E.55%
10:When 1.783 is rounded to the nearest whole number,the result is how much greater than when 1.783 is rounded to the nearest tenth?
求具体解析、步骤、最好能提供sat og 所有具体解析材料、我在网上找的都没有数学部分的解析.急求、请尽快答复