Re: Generl Mathematics Solutions
Here are my answers for the exam. What did everyone else get?
Question 23
a) 4ab over 3
b)
i) approx. 18.5
ii) February
iii) May, June, July, August and September
c)
i) randomly pick people from each year?
ii) 7.275hrs or 7hrs, 16 mins and 30 secs
d)
i) %6
ii) 4kg
iii) 4-6 and above 7
iv) $1.50
Question 24
a) the period of time which the sales were recorded over and it is only a small sample of washing powders we don't know how much the average sale price is for all washing powders
b)
i) 70
ii) 109cm
c) 140, 145, 150, 170, 190
d)
i) 567L
ii) 15cm - i know its wrong it's meant to be 30, i forgot to double the area
Question 25
a)
i)6
ii) 1/3
iii) 2/3
b)
i) 28 days
ii) $8.61 (not sure about this one)
c)
i) 1/60
ii) 1/5370
d) Martha has the better deal with an effective simple interest rate of 6.76%
Question 26
a)
i)drew the diagram
ii) 53m
b)
i) four rectangles with a triangle on top of each
ii) surface area= 204m
c)
i) 98
ii) 37/43
iii) 28 people
d)
17hr 30 mins
Question 27
a)
i) $130000 over 30 years
ii) $45964.80
b)
i)it is physically impossible to have a foot length of O cm
ii) 3cm
iii) the graph is not negative and -1.2 was too wide for the data (second part is wrong you can't get a correlation coefficient of 1)
c)
i) $24000
ii) $7593.75
iii) drew linear graph until year 3 and then a decreasing curve to year 7
Question 28
a)
i) 4- $2 and 50c, two $1 and a 50c, one $1 and three 50c and five 50c
ii) 6/55 (probability tree)
iii) total no. = 2x + y + 0.5w
b)
i) 12
ii) 3500 cars and n income of $17500
iii) d= 6000-V over 500
iv) Anne is incorrect from graph and the maximum daily income is $18000 for a $6 toll