Z = ( 135 - μ ) / σ = -1
z = ( 165 - μ ) / σ = 1
P (x < 135) = P (z < -1) = 0.1587
P (165 < x) = P (1 < z) = 0.1587
.187 * 1000 = 187 more than 165
<span>.187 * 1000 = 187 less than 135</span>
The answer is exactly $36 dollars per month
So, what you do for this problem is that you multiply $14,000 x 0.75
The answer would be $ 10500. You would need to pay $ 10,500.
Hope this helps!
