Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
College Math - card confusing re: repeating decimals
#1
Question 7 of 75

Which of the following is a rational number?

3.245
all of the other choices
3.245245…
3.24...
Explanation

All of the other choices. 3.245245... is periodic (AMBIGUOUS), 3.245 terminates, and 3.24... is periodic.(AMBIGUOUS) I thought periodic decimals need a bar over the repetend.
Reply
#2
I believe the three dots mean that the pattern after the decimal is continually repeated.
Reply
#3
They are most often used to mean non-repeating non-terminating (irrational), for example pi = 3.14159...

While there are several notational conventions for representing repeating decimals, none of them are accepted universally. In the United States, the convention is generally to indicate a repeating decimal by drawing a horizontal line (a vinculum) above the repetend (\tfrac{1}{3}=0.\overline{3}). In the United Kingdom and mainland China, the convention is to place dots above the outermost numerals of the repetend (\tfrac{1}{3}=0.\dot{3}). Another notation employed in parts of Europe is to enclose the repetend in parentheses (\tfrac{1}{3}=0.(3)). Repeating decimals may also be represented by three periods (an ellipsis, e.g., 0.333…Wink, although this method introduces uncertainty as to which digits should be repeated or even whether repetition is occurring at all, since such ellipses are also employed for irrational decimals such as 3.14159…
Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
  Commonwealth University College of Medicine - $18.5K (4 years total) bjcheung77 3 186 Yesterday, 03:49 PM
Last Post: SteveFoerster
  Survey: What Online College Students Need LevelUP 2 82 06-23-2025, 05:21 PM
Last Post: Jonathan Whatley
  Game Math, ICCP Tests, TESC Operating Systems Test AVG 4 1,718 06-16-2025, 01:42 AM
Last Post: macronpio
  Job market for online adjuncts in math/physics soba 3 782 06-12-2025, 02:32 PM
Last Post: wow
  Is there a college that uses projects for credit? pluggingalong 13 2,711 06-11-2025, 12:00 PM
Last Post: Jonathan Whatley
  3 Year Bachelors from a Community College natshar 4 1,216 06-03-2025, 09:32 AM
Last Post: bjcheung77
  Undergrad certs and some college sakasaba 1 545 05-07-2025, 08:48 AM
Last Post: bjcheung77
  ASU Universal Learner Math Weekly Courses Now NON-PROCTORED ! Captainrekt000 16 6,209 05-05-2025, 09:18 PM
Last Post: Captainrekt000
  Saving Money on College SophiaPrincess 2 594 05-03-2025, 11:41 PM
Last Post: Duneranger
  I supported my son when he changed his college major from law to philosophy. LevelUP 1 632 04-14-2025, 11:24 AM
Last Post: Charles Fout

Forum Jump:


Users browsing this thread: 1 Guest(s)