Wednesday, June 8, 2011

June Vacation Chap 9.2 RATE (L4) Self-Paced Learning

1. Mathematics Textbook 1B
(a) Go through Chapter 9 (p9 to p11)
(b) Attempt Exercise 9.2 Q1 to Q10.
Enter your answers to Exercise 9.2 under Comments. Label your Answers with Question numbers.

2. ACELearning Portal: eLearning Portal
> Subject: Secondary 1 Express
> Additional Arithmetic
> Ratio, Rate and Speed: Choose Rate

(a) Go through video lessons: Rate, Average Rate, Example 1, Example 2
(b) Try Practice Drills on your own to check your understanding
Note: An email has been sent to all students via the AceLearning

22 comments:

  1. 1.(a) 3.50
    1.(b) 72
    1.(c) 47
    1.(d) 80
    1.(e) 0.25
    1.(f) 60

    2.(a) $23/h
    2.(b) $920/h

    3.(a) 9km/l
    3.(b) $1.20

    4.(a) 87.5g
    4.(b) 750cm^3

    5.(a) $15
    5.(b) $150

    6.(a) $22.50
    6.(b) $450

    7.(a) 27l
    7.(b) 3 minutes

    8.(a) $26
    8.(b) 25g
    8.(c) Mass: 3000g, Cost: $78

    9.(a) $201600
    9.(b) $4200

    10.(a) 57.9g
    10.(b) No, it is not. A pure gold cube of sides 2cm weighs 115.8g. The other gold cube is 4.2g heavier than the pure gold cube, and hence is not pure gold.

    ReplyDelete
  2. This comment has been removed by the author.

    ReplyDelete
  3. 1a) 3.50
    1b) 72
    1c) 47
    1d) 80
    1e) 4
    1f) 60

    2a) $23/h
    2b) $920/week

    3a) 9km/L
    3b) $1.20/L

    4a) 87.5g/cube
    4b) 0.7g/cm^3 of cube

    5a) $15/ticket
    5b) $150

    6a) $22.50/m^2
    6b) $450

    7a) 27L/min
    7b) 3 minutes

    8a) $26/kg
    8b) 25g/m^2
    8c) 3000g, $78

    9a) $201 600
    9b) $4200/m^2

    10a) 19.3g/cm^3
    11b) No, it is not made of pure gold. The mass of pure gold per cm^3 is 19.3g but the mass of the gold cube per cm^3 is only 15g. Thus, we cannot conclude that the gold cube is made of pure gold.

    ReplyDelete
  4. 1.a) 3.50
    b) 72
    c) 47
    d) 80
    e) 0.25
    f) 60

    2.a) $23/h
    b) $920/h

    3.a) 9km/L
    b) $1.20/L

    4.a) 87.5g/cube
    b) 750cm3/cm3 of cube

    5.a) $15/ticket
    b) $150

    6.a) $22.50/m2
    b) $450

    7.a) 27L/min
    b) 3 mins

    8.a) $26/kg
    b) 25g/m2
    c) 3000g, $78

    9.a) $201 600
    b) $4200/m2

    10.a) 19.3g/cm3
    b)No, it is not pure gold. A pure gold gold cube of side 2cm would weigh 19.3g per cm3. However, the gold cube weighs 15g per cm3.

    ReplyDelete
  5. This comment has been removed by the author.

    ReplyDelete
  6. 1a)$3.50
    1b)72
    1c)47
    1d)$80
    1e)0.25g
    1f)60g
    2a)$23/h
    2b)$920/week
    3a)9km/litre
    3b)$1.20/litre
    4a)87.5g
    4b)750cm3
    5a)$15
    5b)$150
    6a)$22.50
    6b)$450
    7a)27litres
    7b)3 minutes
    8a)$26
    8b)25g
    8c)3kg and $78
    9a)$201600
    9b)$4200
    10a)19.3g/cm3
    10b)No it is not, if it was pure gold, it would weight 154.4g but instead the gold cube weighs 120g.

    ReplyDelete
  7. 1a) $3.50/l
    1b) The rate is 72 vases/day
    1c) The rate is 48words/min
    1d) The price is $80/m^2
    1e) The rate is 4kg/m
    1f) The rate is 60g/egg
    ----------------------------
    2a) His hourly wage rate is $23/h
    2b) His weekly wage rate is $920/week
    ------------------------------
    3a) The rate is 9km/l
    3b) The price is $1.2/l
    ---------------------------
    4a) It is 87.5g/cube
    4b) it is 0.7g/cm^3 of cube
    --------------------------
    5a) The price is $15/ticket
    5b) The price is $150
    ------------------------
    6a) The price is $22.5/m^2
    6b) The price is $450/
    ------------------
    7a) The amount is 27 l/min
    7b) It takes 3min
    --------------------
    8a) It cost $26/kg
    8b) The mass is 25g.
    8c) The mass needed is 3kg and the price would be $78
    ----------------------------
    9a) Jenny paid $201600.
    9b) The price is $4200/m^2
    --------------------
    10a) It is 19.3g/cm^3
    10b) It is not as if the cube was pure gold, it would weigh 154.4g instead, the cube is lighter by 34.4g therefore it is not pure gold.

    ReplyDelete
  8. 1a. $3.50
    1b. 72
    1c. 47
    1d. $80
    1e. 4kg
    1f. 60g
    ________

    2a. $23/hr
    2b. $920/week
    ________

    3a. $95/litre
    3b. $1.2/litre
    ________

    4a. 87.5g/cube
    4b. 0.7/cm^3
    _______

    5a. $15/ticket
    5b. $150/10 tickets

    _______

    6a. $22.50/m^2
    6b. $450/20m^2

    _______

    7a. 27litres/min
    7b. 3min

    _______

    8a. $26/kg
    8b. 25g/m^2
    8c. The mass needed is 3kg and the cost is $78

    _______

    9a. $201 600
    9b. $4200/m^2

    _______

    10a. 19.3g/cm^3
    10b. No it is not, A pure gold cube's mass should be 19.3g/cm^3 but this cube's mass is 15g/cm^3.

    ReplyDelete
  9. This comment has been removed by the author.

    ReplyDelete
  10. 1a)3.50
    1b)72
    1c)47
    1d)80
    1e)4
    1f)60
    2a)$23/h
    2b)$920/week
    3a)9km/litre
    3b)$1.20/litre
    4a)87.5g/cube
    4b)0.7g/cm^3 of cube

    Further practice
    5a)$15/concert ticket
    5b)$150
    6a)$22.50/m^2
    6b)$450
    7a)27litre/min
    7b)3mins

    Math@work
    8a)$26/kg
    8b)25g
    8c)Mass:3000g Cost:$78
    9a)$201600
    9b)$4200/m^2
    10a)19.3g/cm^3
    10b)No,it is not made of pure gold.The mass of the pure gold cube per cm^3 is 19.3g but the mass of the other gold cube per cm^3 is 15g.Hence,The other gold cube is not made of pure gold.

    ReplyDelete
  11. 1a)3.50
    1b)72
    1c)47
    1d)80
    1e)4
    1f)60
    2a)$23/h
    2b)$920/week
    3a)9km/litre
    3b)$1.20/litre
    4a)87.5g/cube
    4b)0.7/cm^3 cube
    5a)$15
    5b)$150
    6a)$22.50/m^2
    6b)$450
    7a)27
    7b)3min
    8a)$26
    8b)25g
    8c)mass:3000g cost:$78
    9a)$201600
    9b)$4200/m^2
    10a)19.3/cm^3
    10b)No as the mass per cm^3 of pure gold should be 19.3g but the other cube mass per cm^3 is 15g.Thus it is not pure gold.

    ReplyDelete
  12. 1)
    a) $3.50/L
    b) 72 vases/day
    c) 47 words/min
    d) $80/m^2
    e) 4kg/m
    f) 60g/egg

    2)
    a) $23/h
    b) $920/week

    3)
    a) 9km/L
    b) $1.20/L

    4)
    a) 87..5g/cube
    b) 0.7g/cm^3

    5)
    a) $15/ticket
    b) $150

    6)
    a) $22.5/m^2
    b) $450

    7)
    a) 27L/min
    b) 3 minutes

    8)
    a) $26/Kg
    b) 25g
    c) Mass -3Kg Cost - $78

    9)
    a) $201600
    b) $4200/m^2

    10)
    a) 19.3g/cm^3
    b)
    No. The mass of PURE gold per cm^3 is 19.3g but the other gold cube's (mass/cm^3) rate is 15g which is lower than the Pure gold cube's. Thus the second cube cube of gold cannot be Pure gold.

    ReplyDelete
  13. 1)
    a) $3.50/ℓ
    b) 70 vases/day
    c) 47 words/min
    d) $80/m^2
    e) 4kg/m
    f) 60g/egg

    2)
    a) $23/hour
    b) $920/week

    3)
    a) 9km/ℓ
    b) $1.20/ℓ

    4)
    a) 87.5g/cube
    b) 0.7g/cm^3 of cube

    5)
    a) $15/ticket
    b) $150

    6)
    a) $22.50/m^2
    b) $450

    7)
    a) 27ℓ/min
    b) 3 minutes

    8)
    a) $26/kg
    b) 25g/m^2
    c) 3kg, $78

    9)
    a) $201 600
    b) $4200/m^2

    10)
    a) 19.3g/cm^3
    b) No, it is not. The mass of pure gold per cm^3 (19.3g) is different from the gold cube's mass per cm^3 (15g) so we cannot conclude that the gold cube is made out of pure gold.

    ReplyDelete
  14. 1a. 3.50
    1b. 72
    1c. 47
    1d. 80
    1e. 4
    1f. 60

    2a. $23/hour $23 per hour
    2b. $920/week $920 per week

    3a. 9km/ litre
    3b. $1.20/ litre

    4a. 87.5g/cube
    4b. 0.7g/cm^3

    5a. $15/1ticket
    5b. $150

    6a. $22.50/m^2
    6b. $450

    7a. 27litre/min
    7b. 3 min

    8a. $26/kg
    8b.25g/m^2
    8c. 3kg $78

    9a.$201600
    9b. $4200/ m^2

    10a. 19.3g/cm^3
    11b. No,it is not. As the mass of pure gold per cm^3 is 19.3g, and the mass of a gold cube is 15g per cm^3, they are different so i cannot conclude that the gold cube is made of pure gold

    ReplyDelete
  15. 1.
    a)$3.50
    b)72
    c)47
    d)80
    e)0.25
    f)60

    2.
    a)$23
    b)$920

    3.
    a)9
    b)$1.20

    4.
    a)87.5g
    b)125cm^3

    5.
    a)$15
    b)$150

    6.
    a)$22.50
    b)$450

    7.
    a)27ℓ
    b)3min

    8.
    a)$26
    b)25g
    c)3kg, $78

    9.
    a)$201600
    b)$4200

    10.
    a)19.3g
    b) No, it is not. The difference between the mass of the pure gold cube per cm^3 and the mass of the gold cube is different, hence we cannot conclude the gold cube in entirely made of pure gold.

    ReplyDelete
  16. 1.(a) 3.50
    1.(b) 72
    1.(c) 47
    1.(d) 80
    1.(e) 0.25
    1.(f) 60

    2.(a) $23/h
    2.(b) $920/h

    3.(a) 9km/l
    3.(b) $1.20

    4.(a) 87.5g
    4.(b) 750cm^3

    5.(a) $15
    5.(b) $150

    6.(a) $22.50
    6.(b) $450

    7.(a) 27ℓ
    7.(b) 3 min

    8.(a) $26
    8.(b) 25g
    8.(c) Mass: 3kg, Cost: $78

    9.(a) $201600
    9.(b) $4200

    10.(a) 57.9g
    10.(b) No, it is not. The mass of pure gold per cm^3 and the mass of the gold cube per cm^3 is different so the gold cube is not pure gold.

    ReplyDelete
  17. 1a)$3.50/ℓ
    1b)72
    1c)47
    1d)$80 m^2
    1e)4kg/m
    1f)60


    2a)$23
    2b)$920


    3a)9km/ℓ
    3b)$1.2


    4a)87.5g
    4b)0.7g


    5a)$15
    5b)$150


    6a)$22.5
    6b)$400


    7a)27ℓ
    7b)3min


    8a)$26
    8b)25g
    8c)mass:300g cost:$78


    9a)$201 600
    9b)$4200


    10a)19.3g
    10b)No,because the mass of pure gold per cm^3 is 15g but previously it was 19.3g

    ReplyDelete
  18. 1a. $3.50/litre
    1b. 72 vases/day
    1c. 47 words/min
    1d. $80/m^2
    1e. 4kg/m
    1f. 60g/egg

    2a. $23/h
    2b. $920

    3a. 9km/litre
    3b. $1.20/litre

    4a. 87.5g/cube
    4b. 125cm^3/cube

    5a. $15/ticket
    5b. $150

    6a. $22.50/m^2
    6b. $450

    7a. 27 litre/min
    7b. 3mins

    8a. $26/kg
    8b. 25g/m^2
    8c. 3kg, $78

    9a. $201 600
    9b. $4200/m^2

    10a. 19.3g/cm^3
    10b. No, the rate of the gold per cm^3 in the gold cube is not equal to that of the pure gold cube, thus it is not made of pure gold.

    ReplyDelete
  19. 1a. $3.50/litre
    1b. 72 vases/day
    1c. 47 words/min
    1d. $80/m^2
    1e. 4kg/m
    1f. 60g/egg

    2a. $23/h
    2b. $920

    3a. 9km/litre
    3b. $1.20/litre

    4a. 87.5g/cube
    4b. 125cm^3/cube

    5a. $15/ticket
    5b. $150

    6a. $22.50/m^2
    6b. $450

    7a. 27 litre/min
    7b. 3mins

    8a. $26/kg
    8b. 25g/m^2
    8c. 3kg, $78

    9a. $201 600
    9b. $4200/m^2

    10a. 19.3g/cm^3
    10b. -

    ReplyDelete
  20. 1a) 3.50
    1b) 72
    1c) 47
    1d) 80
    1e) 4
    1f) 60

    2a) $23/h
    2b) $920/week

    3a) 9km/L
    3b) $1.20/L

    4a) 87.5g/cube
    4b) 0.7g/cm^3 of cube

    5a) $15/ticket
    5b) $150

    6a) $22.50/m^2
    6b) $450

    7a) 27L/min
    7b) 3 minutes

    8a) $26/kg
    8b) 25g/m^2
    8c) 3000g, $78

    9a) $201 600
    9b) $4200/m^2

    10a) 19.3g/cm^3
    10b) No,it is not pure gold. A pure gold gold cube of side 2cm would weigh 19.3g per cm3. However, the gold cube weighs 15g per cm3.

    ReplyDelete
  21. 1a) 3.50
    1b) 72
    1c) 47
    1d) 80
    1e) 4
    1f) 60

    2a) $23/h
    2b) $920/week

    3a) 9km/L
    3b) $1.20/L

    4a) 87.5g/cube
    4b) 0.7g/cm^3 of cube

    5a) $15/ticket
    5b) $150

    6a) $22.50/m^2
    6b) $450

    7a) 27L/min
    7b) 3 minutes

    8a) $26/kg
    8b) 25g/m^2
    8c) 3000g, $78

    9a) $201 600
    9b) $4200/m^2

    10a) 19.3g/cm^3
    11b) No, it is not made of pure gold. The mass of pure gold per cm^3 is 19.3g whereas the mass of the gold cube per cm^3 is only 15g.

    ReplyDelete
  22. 1 a) $3.50
    b) 72
    c) 47
    d) 80
    e)0.25
    f)60

    2 a) $23/1h
    b) $920/1h

    3 a) 9km/l
    b) $1.20/l

    4 a) 87.5 g
    b) 125cm^3

    5 a) $15
    b) $150

    6 a) $22.50
    b) $450

    7 a) 27l
    b) 3 min

    8 a) $26
    b) 25g
    c) Mass:3000 g Cost:$78.00

    9 a) $201 600
    b) $4200

    10 a) 19.3
    b) No it is not. Based on the actual real gold cube , a pure gold cube of 2 cm will weigh 154.4g.But instead, it weighs 120g.

    ReplyDelete