Niles sailed for 7 hours,because 56:8=7,and Bob the same because 84:12=7
Answer:


Step-by-step explanation:

a) about the line y = 3
⇒
is the intersection point
So,

b) about the line x = 5
⇒ 
So,
![V = \int\limits^3_0\pi([5-0]^2-[5-y^2/9]^2)\:dy=\pi\int\limits^3_0(25-25+10y^2/9-y^4/81)\:dy=\\\\=\pi(10y^3/27-y^5/405)|^3_0=\pi(10-3/5)=\frac{47}{5} \pi](https://tex.z-dn.net/?f=V%20%3D%20%5Cint%5Climits%5E3_0%5Cpi%28%5B5-0%5D%5E2-%5B5-y%5E2%2F9%5D%5E2%29%5C%3Ady%3D%5Cpi%5Cint%5Climits%5E3_0%2825-25%2B10y%5E2%2F9-y%5E4%2F81%29%5C%3Ady%3D%5C%5C%5C%5C%3D%5Cpi%2810y%5E3%2F27-y%5E5%2F405%29%7C%5E3_0%3D%5Cpi%2810-3%2F5%29%3D%5Cfrac%7B47%7D%7B5%7D%20%5Cpi)
Answer:
w≅8.46ft
Step-by-step explanation:
Data
focus=8
vertex=(0,0)
width=?
depth (y)=3ft
parabola equation:
; then for V=(0,0),
, be focus(f)=8in;
→ 
we have that y=3ft then
; but 1in≅0.083ft so
→ x=±2.82, finally w=3*2.82≅8.46ft
Answer: 2
Explanation: the slope = rise/run. so if u have two points on the line, count how much it goes up and down divided by how much it goes left and right. so the line goes up 2, left 1, so the slope is 2/1 or 2.
hope this makes sense!