Answer:
L = 5 m
Step-by-step explanation:
The ladder, the vertical wall and the ground form a right triangle. We call A and B the ends points of the ladder ( at the wall, and the ground)
If we call L the lenght of the leadder, we get
L² = y² + x²
Taking derivatives on both sides of the equation
0 = 2y Dy/dt + 2x Dx/dt
We know that Dy/dt = - 0,675 m/s (is sliding down , is decreasing)
And when x = 3 m Dx/dt = 0,9 m/s
So we can get y
0 = 2y*( -0,675) + 2*3*0,9
1,35y = 5,4
y = 5.4 /1,35 ⇒ y = 4
And L² = y² + x² ⇒ L = √ (4)² + (3)² ⇒ L √16 + 9
L = 5 m
Answer:
$7
Step-by-step explanation:
Answer:
Step-by-step explanation:
Given
Represent the volume of the cylinder with V1 and the cone with V2.
So:
Required
Find V2
The volume of a cylinder is:
Because the cone and the cylinder have the same base area and height, the volume of the cone is:
Substitute for .
Substitute 1751 for V1
<em>The volume of the cone is 583.67 cubic units</em>
Answer:
12 Rulers and 17 Pencils
Step-by-step explanation:
15 x 8 = cents spend
15 x 8 = 120
$5-120cents ($1.2) = $3.8 (380 cents)
380/30= 12 rulers with 20 cent remaining
20/8= 2 pencils with 4 cent remaining
now add!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
12 ruler +2 pencils +15 pencils=
12 Rulers and 17 Pencils