Y=1/16x^2
multiplying both sides by 16 we get:
16y=x^2
The general form of a parabola is:
(x-h)^2=4p(y-k)
thus
4p=16
p=4
The parabola opens upwrd:
Focus: (h,k-p)
(0,0-4)
=(0,-4)
Directrix: y=-4
All the triangles are similar, so the ratio of (long leg)/(short leg) is the same. The long leg of ΔADB is
.. AD = AC -DC = 20 -4
.. AD = 16
Then
.. (long leg)/(short leg) = AD/DB = BD/DC
.. 16/h = h/4
.. h^2 = 64
.. h = 8
Selection D is appropriate.
_____
You may see this again. The altitude (h) from the right angle in a right triangle is the geometric mean of segments AD and DC. That is,
.. h = √((AD)*(DC))
In my opinion I do not see images but thank you anyway
32 is 2^5, so you can say:
32a^5 = 2^5*a^5 = (2a)^5
Answer:
2315₁₀ = 3152₉
Step-by-step explanation:
2315÷9 = 257 R2
257÷9 = 28 R5
28÷9 = 3 R1
3÷9 = 0 R3
The remainders, last to first, are 3, 1, 5, 2.
2315₁₀ = 3152₉
