For each trip, a taxi company charges a fixed fee of $2.00 plus $0.75 for each 1/2 mile or fraction of 1/2 miles...

Source: GMAT Prep

For each trip, a taxi company charges a fixed fee of $2.00 plus $0.75 for each 1/2 mile or fraction of 1/2 miles. If, for every number x, [ x ] is defined to be the least integer greater than or equal to x, then which of the following represents the company's charge, in dollars, for a trip that is r miles long?

A. 2.00 + [0.75r/2]
B. 2.00 + 0.75[r/2]
C. 2.00 + 0.75[r]
D. 2.00 + [1.5r]
E. 2.00 + 0.75[2r]

The OA is E

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