Math Problem
Question 1
Prices under offer (1)
Therefore, the price is £4.50 – £1.35 = £3.15
Therefore, the price is £1.29 – £0.387 = £0.903
Prices under offer (2)
- If 70% = 450 g
100% =?
- 100% = £1.29
70% =?
Prices under offer (3)
Buy one, get another one half price
One 450g pack = £4.50
Half of £4.50 = £2.25
So, two 450g packs cost = £4.50 + £2.25 = £6.75
Therefore,
If 900g = £6.75
Then, 100g =
Percentage decrease
£1.29 – £0.75 = £0.54
Comparison table
Offer 1 | Offer 2 | Offer 3 | |
Quantity (in g) | 540 | 742.857 | 1000 |
Total cost (in £) | 5.403 | 5.403 | 7.29 |
Price/100g (in £) | 0.903 | 0.903 | 0.75 |
Question 2
- 1 : 25 000
This means that 1 cm on the map represents 25 000 cm on the ground
Therefore, 18.4 cm represents:
18.4 cm x 25 000 cm = 460000 cm
This is equivalent to 460,000cm divided by 100,000cm = 4.6 km
- (i)
Distance = 8 km
Time = 2.5 hours
(ii) 1 km/h = 0.277778 m/s
Therefore, 0.277778 x 3.2 = 0.89 m/s
- (i) 180m – 60m = 120m
120m + 250m = 370m
370m – 150m = 220m
Highest height = 370m
Lowest height = 120m
(ii) Number line
(iii)
- Naismith’s Rule
H = 140 m
D = 2.6 km or 2600 m
T = 520 + 0.23 + 104 = 624.23 minutes
Question 3
- Hay eating table of an overweight horse
Ideal body weight of horse (in Kg) | 200 | 300 | 400 | 500 | 600 | 700 | 800 |
Weight of hay (H in Kg) | 3 | 4.5 | 6 | 7.5 | 9 | 10.5 | 12 |
- Graph
- First is to pinpoint where 6.5 kg of hay is on the vertical axis and draw a straight line to join the line of the plot and then check the value of ideal body-weight of the horse of the horizontal axis.
- (i) Charges
£65 = to shoe a horse
£20 = to trim an unshod horse hooves
£10 = travelling
Total charge = (2 x £20) + (3 x £65) + £10
Overall total = £40 + £195 + £10 = £245
(ii) Assume x = the number of horses to shoe
y = the number to trim an unshod hooves
C = 65 x + 20 y + 10
Reference
Magyari-Sáska, Z. & Dombay, Ş. (2012). Determining minimum hiking time using DEM. Geographia Napocensis (Academia Romana – Filiala Cluj Colectivul de Geografie). Anul VI (2): 124–9. Retrieved 5 November 2014.