IB MATH STUDIES 6TH HOUR Monday, 9/22/14

SI(International Systems)Copy & Study ChartsPage 45 & 46IB MATH STUDIES 6TH HOURMonday, 9/22/14SI ConversionsExamplesa) 3540 mm to m 3540 mm ( 1m/1000mm)=3.54m

b) 7.14 kg to g 7.14kg( 100g/1kg) = 7140g

c) 4 hours 12 min to s (1hr= (60min)(60s) = 3600s) ( 4h x 3600s)+((12min x 60s)=15120s

d) 15 knots to km/h 15kn x 1.852 = 27.78km/h

CW: p. 47 # 1 -4(all) HW p. 47 # 5 - 9

Rounding Numbers/SF(Significant Figures)REVIEW (SF)(N, LOOK AT (N+1) DIGITIf it is 0,1,2,3,4 NO CHANGEIF IT IS 5,6,7,8,9 INCREASE BY 1DELETE ALL DIGITS OF THE NTH DIGIT REPLACING BY 0SREVIEW (ROUNDING NUMBERS)If the digit after the one being rounded off is less than 5 (0,1,2,3,4) ROUND DOWNIf the digit after the one being rounded off is 5 or more ( 5,6,7,8,9) ROUND UP

*IB EXAMINATIONS :YOU ARE EXPECTED TO GIVE ANSWER TO 3 SF UNLESS OTHERWISE SPECIFIED IN THE QUESTIONTry these problemsROUNDa) 8.183 to 2 sfb) 0.00232 to 2 sfc) 525 to 1 sfd) 6.057 to 3 sfTry these problemsRounda) 8.183 8.2 (2sf) b) 0.00232 0.0023 (2sf) c) 523 500 (1 sf) d) 6.057 6.06 (3sf)SPEEDAverage speed(S) = distance travelled (D) time taken(T)Time taken(T) = distance travelled (D) average speed(S)Distance travelled(D) = average speed(S) x time taken(T)

Example: SpeedA car is travelling a distance of 325 kmA) Find its average speed if the trip takes 4 h 17 minS = D , 325km = 75.9km/h T 4.2883h(17min x 1h = 4.2883h) 60minB)Find the time taken if the average speed is 93 km/hT = D = 325km = 3.49(Change hr min sec use DMS TI84+) S 93km/h = 3h 29min 41 sCW: p. 49 #1(a e), p. 51 #2 p. 54 #1HW: p. 54 # 2 -5

Other Rate Problems Wed 9/24/14Exs 2F.2

Pg. 56-68 # 1,2Pg. 57-58 # 3-9Thursday (9/25)Accuracy of MeasurementsCW:Pg 58 59 # 1 5HW: Pg 59-60 # 6-9

Prepare for Test on Ch 2A 2FFriday, 9/26/14Review for Test on Tuesday (9/30)

Pg. 70 # 1 7 (Review Set 2A)Pg. 71 # 1 6 ( Review Set 2BPg. 72 # 1 6 (Review Set 2C)

Monday 9/29/14Review Problems on pages 70-72

Test on Tuesday 9/30/14

Study these problems