Answer:
The correct option is;
x = 1
Step-by-step explanation:
The parameters given are;
Location of circle center = 1 on the x axis
Radius of circle = 1
Required operation on circle = Revolving to create a sphere
To form a spherical shape by the rotation of a circular figure involves rotating the circular figure about a line passing through the center of the circle
Therefore, to form a sphere, the circle should be about a line that passes through x = 1
Hence, the circle should be rotated about the line x = 1.
Question 8 should be y=-5/2x-1. And question 9 should be y=1/2x-7.
Answer:
The angle of elevation is given by,
∅ = 
Step-by-step explanation:
<em>The length ladder is given as 20.75 feet.</em>
<em>The depth of ground is 3 feet below.</em>
The figure formed is that of a right angled triangle.
Let the angle of elevation be ∅.
By trigonometry,
sin(∅) = 
Thus, the angle of elevation is given by,
∅ =
80. this is bc the triangle must add up to 180 and 60+40=100
<h2>
Answer:</h2>
144 cm squared
<h2>
Step-by-step explanation:</h2>
The steps are same as for the calculation of area of the octagon I solved for you earlier. That is why I will post here only calculations and not the actual steps.
360/10=36 degrees
36/2=18 degrees
sin(18)=x/7
x= 2.1631 cm
Cos(18)=y/7
y=6.6573
y*x= 14.4006
14.4006*10=144 cm squared
