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Sagot :
9514 1404 393
Answer:
a) sound system: $500
b) navigation system: $1000
Step-by-step explanation:
The cost of the car with its upgrades (before tax) is ...
$48,346.31/1.065 = 45,395.60
This means the total cost of the sound and navigation upgrades is ...
$45,395.60 -43,895.60 = $1500
The ratio of sound system cost to navigation system cost is 1 : 2, so the sound system accounts for 1/(1+2) = 1/3 of the cost of the upgrades.
a) The upgraded sound system cost is 1/3 × $1500 = $500.
b) The upgraded navigation system cost is 2/3 × $1500 = $1000.
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