Answer:
You need to have some idea where you want to start if you're going to derive equations for these. You can start with a definition based on focus and directrix, or you can start with a definition based on the geometry of planes and cones. (The second focus is replaced by a directrix in the parabola.) In general, these "conics" represent the intersection between a plane and a cone. Perpendicular to the axis of symmetry, you have a circle. At an angle to the axis of symmetry, but less than parallel to the side of the cone, you have an ellipse. Parallel to the side of the cone, you have a parabola. At an angle between the side of the cone and the axis of the cone, you have a hyperbola. (See source link.)
You can also start with the general form of the quadratic equation.
.. ±((x-h)/a)^2 ± ((y-k)/b)^2 = 1
By selecting signs and values of "a" and "b", you can get any of the equations. (For the parabola, you probably need to take the limit as both k and b approach infinity.)
Answer:
please give complete question .
Answer:
40 books
Step-by-step explanation:
Divide 20 kg by 500 g, or, alternatively, divide 20 kg by 0.5 kg.
Either way, the result is 20/0.5, or 40.
40 books of the same mass would have the same mass as the bookcase.
Hope this helps :)
Answer:
0.00021 Ω
Step-by-step explanation:
R = ρℓ/A
Resistivity: ρ = 1.68×10 ̄ ⁸ Ωm
Length: ℓ = 1.0 m
Area: A = π*radius² = π * ( (0.40inch * 0.0254m/inch) / 2 )² = 8.1×10 ̄ ⁵ m²
Can you take a picture of the problem... because we cant see the shape or any of the angles for that manner.