RD SIGNIFICANT DIGITS DETERMINE THE PRECISION OF THE 00000100 PRODUCT OF TWO MEASURES. 00000200 IF YOU WANT TO LEARN MORE ABOUT SIGNIFICANT DIGITS, 00000300 TYPE A LEFT-POINTING ARROW. 00000400 LA DUMMY 00000500 QU THERE ARE FIVE BASIC RULES IN DETERMINING THE NUMBER 00000600 OF SIGNIFICANT DIGITS IN A GIVEN MEASURE. FOUR OF 00000700 THEM ARE CONCERNED WITH ZEROES. TWO OF THESE RULES 00000800 YOU WILL LEARN IN THIS COURSE. 00000900 THE FIRST THING TO LEARN IS THAT ALL NON-ZERO DIGITS 00001000 ARE SIGNIFICANT. FOR INSTANCE, THE NUMBER 625 00001100 HAS 3 SIGNIFICANT DIGITS. 00001200 HOW MANY SIGNIFICANT DIGITS DOES THE NUMBER 5289 HAVE. 00001300 CA 4 00001400 CB FOUR 00001500 TY VERY GOOD 00001600 WA 5289 00001700 TY WE WANT THE NUMBER OF DIGITS, NOT THE NUMBER ITSELF. 00001800 UN NO, THAT IS NOT RIGHT. TRY AGAIN. 00001900 UN IF YOU GIVE UP, TYPE HELP. 00002000 QU HOW MANY SIGNIFICANT DIGITS DOES 524.6 HAVE. 00002100 CA 4 00002200 CB FOUR 00002300 TY VERY GOOD. ALL NON-ZERO DIGITS ARE COUNTED IN A 00002400 DECIMAL NUMBER TOO. 00002500 WA 3 00002600 WB 2 00002700 WB 1 00002800 TY NO. YOU SHOULD COUNT EVERY NON-ZERO DIGIT. GUESS AGAIN. 00002900 UN THERE ARE ONLY FOUR DIGITS IN THE NUMBER AND ALL ARE 00003000 NON-ZERO. TRY AGAIN. 00003100 QU I THINK YOU HAVE THE RIGHT IDEA. NOW LET US TALK 00003200 ABOUT ZEROES. 00003300 ZEROES ARE ALWAYS SIGNIFICANT IF: 00003400 THEY ARE BETWEEN TWO NON-ZERO DIGITS. FOR EXAMPLE, 00003500 206 HAS 3 SIGNIFICANT DIGITS, AND 3005 HAS FOUR 00003600 SIGNIFICANT DIGITS. 00003700 THIS IS ALSO TRUE OF DECIMALS. THE DECIMAL NUMBER 00003800 60.03 HAS 4 SIGNIFICANT DIGITS. 00003900 00004000 THE ZEROES APPEAR AT THE END OF A DECIMAL NUMBER. 00004100 6.0 IMPLIES THAT THE MEASUREMENT WAS TAKEN TO THE 00004200 NEAREST TENTH, SO THE DIGIT IN TENTHS PLACE IS CON- 00004300 SIDERED A SIGNIFICANT DIGIT. THEREFORE, 6.0 HAS 00004400 2 SIGNIFICANT DIGITS. 00004500 HOW MANY SIGNIFICANT DIGITS ARE THERE IN THE MEASURE 00004600 604. 00004700 CA 3 00004800 CB THREE 00004900 TY VERY GOOD. 00005000 WA 2 00005100 TY YOU FORGOT TO COUNT THE ZERO. GUESS AGAIN. 00005200 UN GIVE IT ONE MORE TRY. 00005300 QU HOW MANY SIGNIFICANT DIGITS DOES THE MEASURE 6,042.00 00005400 HAVE. 00005500 CA 6 00005600 TY EXCELLENT. THAT IS ENOUGH FOR NOW. YOU WERE VERY 00005700 SWEET TO TAKE THE COURSE. GOODBYE. 00005800 WA 3 00005900 TY YOU MUST ALSO CONSIDER THE ZEROES. TRY AGAIN. 00006000 WA 4 00006100 TY REMEMBER. ZEROES AT THE END OF DECIMAL NUMBERS ARE 00006200 SIGNIFICANT. 00006300 WA 5 00006400 TY YOU FORGOT TO COUNT THE ZERO BETWEEN THE 6 AND THE 4. 00006500 GUESS AGAIN. 00006600 UN YOU HAVE ONE MORE TRY. 00006700 UN YOU WILL BE TAKEN BACK FOR A REVIEW 00006800 BR DUMMY 0000000400006900 99 00007000