
Kenneth S. answered 04/20/17
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Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018
Ask your teacher to teach this subject, or, if he or she indicates that was done, then you need to (1) pay more attention in class, (2) read the textbook, (3) participate in a study group of peers, (4) research rationals and irrationals online.
The number -68.86 can be written -6886/100 and now it's obviously RATIONAL.
(The term repeating should be used only in connection with a number such as 1/9, which is 0.111111.... (infinitely many 1s after decimal point.)