The formula for the pay of a mathematics major is:
P = 48,100 + 2,600t
We want to find the value of t when P is at least 90,000:
90,000 ≤ 48,100 + 2,600t
Now, we can solve for t:
41,900 ≤ 2,600t
t ≥ 41,900 / 2,600
t ≥ 16.115
So, a mathematics major would
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