Havn't been through the other threads but these are suggested solutions for the 3 modules and core (credits goes to jasoN-)
Core:
1a) 50%
b) med=28
ran=56
IQR=17
c)1/6 (16% for canada)
d) approximately symmetric
2a) male income
b) $350
c) $18250
ci) extrapolation
3a) plot
b) increasing trend (as years increases, GDP increases)
c) GDP = 20000 + 524 x time
d) 34148, error of $752
Graphs:
1a) R = 65x
b) C = $1700
c) sketch
d) 20 pillows
2) 40
3a) the total number of pillows sold must not exceed 150
b) k = 45
ci) sketch
ii) sketch
d) $9075
e) let Snorestop = 2x, x + y + 2x less than or equal to 150
=> 3x + y less than or equal to 150
f) R = 175x + 50y
g) (35,45), R = $8375
Networks
1a) 0 means can't directly communicate
b) f = 1, g = 0
2a) 11 mins
b) Hamilton path
ii)(attached)
3a) D
bi) B, D, F
ii) 32
c) B and D
4a) 2 activities
b) 9 minutes
c) A, C
d) 4 min
e) 16 min
f) ABDH
Matrices
1a) N = [4 8 2]
b) P = [26]
c) Oscar scores 26 points
2a) 20% heavy this week to moderate the next week
b) 66
c) 6
3a) [1 1 1]
[2 -1 3]
[1 2 1]
b) x = -5
c) 10 rebounds
4ai) A2 = [2100]
[1100]
ii) 3200 caps
b) A10 = [2163]
[1613]
c) gradually more people attend until eventually 3000 people attend, with no change in the future
d) Less people attend over time until eventually 600 people attend with no change in the future
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