You are correct!
Step 1:Write what you know
Madeline's Height: 6 ftMadeline's Shadow: 108 in
Friend's Height: X (we use X as a variable because his height is unknown)Friend's Shadow: 108 in - 1.5 ft 108 in - 18 in 90 in
Step 2:Set up proportions
6 x----- = -----108 90
Step 3:Cross Multiply & Solve
108x = 540x = 5 ft tall
2 opposite interior angle (opposite to the exterior angle) added together are equal to the exterior angle
6x-1+85 = 18x
6x +84 = 18x
subtract 6x from both sides
84 = 12x
divide both sides by 12
x = 7
<em>hope this helps! </em>
The total surface area of a cone with a radius of 7 and a slant height of 9 would be around 351.858.
The lateral surface area of a cone with a radius of 7 and a slant height of 9 would be around 197.92.
You can use cone formulas to fine the surface areas, like the formula to find the slant height of the cone, to find the height of the cone and then solve for the area.
Hope this helps!
(2,1), (4,2), (6,3) or (8,4) are the numbers we will use to find the first differences which will give us the unit rate
2/1 = 2
4/2= 2
6/3= 2
8/4= 2
therefore this graph is linear and its unit rate is 2.