Select the correct graph. The ideal speed of an elevator is 120 feet/minute. But the elevator's speed is allowed to vary by less than a certain amount. Identify the graph
of the variance levels that indicate unacceptable elevator speeds.
+200
180
-160
-140
20
+10
30
YA
+200
+180
+160
8 +140
8120
Variance in Speed (feet/second)
Variance in Speed
-50
40
+20
38 40 60 80 100 120 140 160 180 200 220 240 260 280
Speed (feet/second)
&+100
+80
+60
+40
-20
+ + +
-28 40 60 80 100 120 140 160 180 200 220 240 950 280
Speed (feet/second)
у
+200
+180
+-160
+-140
---120
&+100
y
200
-180
-150
140
120

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584

what is the answer?

d 25 pi/6

step-by-step explanation:

the diameter is 10 inches

the radius is 1/2 of the diameter or 5 inches

the area of the circle is

a = pi r^2

  = pi 5^2

  = 25 pi

the slice is 60 degrees of the entire circle.

60 degrees out of 360   60/360 = 1/6

the area of the slice is 1/6 of the circle

a slice = 1/6 a circle

a slice = 1/6 * 25 pi