Posted by **Grace** on Tuesday, July 2, 2013 at 4:55pm.

An airplane traveled a distance d in t hours, where r>1, and arrived one hour late. The airplane would have arrived on time if it had traveled at what rate per hour?

a. t-1

b. d/t-1

c. d/t+1

d. d/t-1

e. d/t+1

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