Answer:
Step-by-step explanation:
put x=r cos θ
y=r sin θ
r²cos²θ-r²sin²θ=3rsin θ
r²(cos²θ -sin²θ)=3r sin θ
r²cos 2θ=3rsinθ
r cos 2θ=3 sin θ
r=3sec 2θ sin θ
<u>Answer:</u>
An equation that relates the speeds of the two legs of the trip

<u>Explanation:</u>
Given, we have to use x to represent the speed on the second leg
Speed on first leg when increasing your speed by 40 mph will be (x-40)
Distance is given as 640 miles and time is calculated as

According to the question, increasing speed saved four hours
Therefore, the equation that relates the speeds of the two legs of the trip will be

3,058 round to the the Thousands place is 3,000
Hope this helps!
Answer:
16.48
Step-by-step explanation:
Answer:
Divide the figure above into a cylinder and a dome
+) the volume of the dome is

the surface area is

+) the volume of the cylinder is

the surface area is

so the volume of this figure is

the surface area of this figure is
