Answer:
dx/dt = 0,029 ft
Step-by-step explanation:
Let call "x " diameter of the base of the cone then h (height ) is equal to x
V = ( 1/3)* A(b) *h
A(b) = π*(x/2)²
Then
Volume of the cone is
V = ( 1/3)*π*(x/2)²*x
V = ( 1/12)*π*x³
Then:
dV/dt = ( 1/12)*π* 3*x²*dx/dt ⇒ dV/dt = ( 1/4)*π*x²*dx/dt
dV/dt = (1/4)*π*(21)²*dx/dt
As dV/dt = 10 ft³
10*4 = 441*π* dx/dt ⇒ dx/dt = 40/ 1384,74
dx/dt = 0,029 ft
Just divide 18 by 20 , so its 0.9
88(3.7+4.3)-2*2.6
88(8)-2*2.6
704-2*2.6
704-5.2
698.8
I hope it helps!
Please mark Brainliest if it does!:-)
362= 300 + 60 + 2
(4×300) + (4×60) + (4×2)
1200 + 240 + 8
1448