每日一题

Mathematics

Ann donates blood for the first time on May 15th, which is the 135th day of the year. She may donate again every 56 days. Which of the following inequalities can be used to determine the number of times, n comma that Ann may donate this year? (Assume 1 year=365 days.)

A.56n+135≤365
B.56(n-1)+135≤365
C.56n-1+135＜365
D.56(n+135)＜365

答案和解析

答案：B

解析：

Choice B is correct.