Andrea wants to pay off her student loan within the next three years, so she has
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Answer:
see explanation
Step-by-step explanation:
Given that t and w vary inversely then the equation relating them is
t = ← k is the constant of variation
To find k use the condition t = when w = 4
k = tw = × 4 =
t = ← equation of variation
When w = 9, then
t = =