好易 vesy vesy easy 小六數~急 請幫助

1. Principal Interest rate p.a period(year) simple interest amount

(a) $500 2% 2 $20 $520

(b) $1000 18% 3 $540 $1540

(c) $2000 4% 2 $160 $2160

(d) $3000 6% 5 $900 $3900


2.A rectangular vessel of height 1.5m, length 0.8 and width 0.6m
is filled up with oil. If the price of oil is $15 per litre, find the total
price of the oil in the vessel.
Capacity of rectangular vessel = 150 cm * 80 cm * 60 cm = 720000 cm^3 = 720 L
Total price of oil = ($15 per litre) x (capacity in litre) = $15 * 720 = $10800


3.A rectangular metal block of dimensions 8cm*10cm *12cm is
melted and recast into another rectangular block of length 15cm
and width 8 cm. Find the height of the new rectangular block.
Volume = 8cm*10cm *12cm = 960 cm^3
New height = Volume/(length * width)
= 960 cm^3/(15 cm * 8 cm)

New height = 8 cm


4. State whether the following data are discrete data or continuous data.

(a) Height ~ continuous
(b) Number of books at home ~ discrete
(c) Time spent on travelling per day ~ continuous
(d) Number of words in a composition ~ discrete
(e) Capacity of a cup ~ continuous