Using google calculator you can see that
e≈2.7 1 8 2 8 182846.....
Fifth decimal place is bold 8.
When we round up to 5th decimal place, we get
e≈2.7 1 8 2 8.
101.65 x .30= 30.50 saving
so take 101.65 - 30.50= 71.15
Answer: 27 ft
Step-by-step explanation:
Given
the angle of elevation is 
Length of track is 
Vertical rise is given by

I'm not sure how you obtained -5 as your answer but this is the mathematical explanation. hope this helps!
Answer:
B. 4x ≤ 320
Step-by-step explanation:
Not sure how to explain my thinking. However, 4x must be smaller than 320 because she cannot spend more than that.