Tan θ = -3/4.
In 4th quadrant, sin θ is negative.
Therefore, sin θ = -3/5
13.60 because you add the coupon discount back on and subtract tax cost and divide by 2
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Its the third pair of inequalities
b 26 < n < 30
so n = 28
the 3 numbers are 28, 30 and 32