# math

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Given Q(4;1),T(p;3) and length QT=root of 8 units ,determine the value of p

• math -

√( (p-4)^2 + (3-1)^2) )= √8
square both sides
(p-4)^2 + 4 = 8
(p-4)^2 = 12
p-4 = ±√12
p = 4 ± 2√3

• mathSsS -

1.Seven years ago, Rocco's drum kit cost him R12500.It has now been valued at R2300. What rate of simple depreciation does this represent?
2. Fiona buys a DStv satelite dish for R3000. Due to weathering ,its value depreciates simply at 15% p.a .after how lond will the satellite dish have a book value of zero?

• math -

11,65

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