Answer:
Ss the correct asnwers is:
(0,20) ; y = (x²/80) + 20
Step-by-step explanation:
Given that:
Shape of the satellite dish = parabola
Focus of the satellite dish = 40ft above the ground
Let the point on ground be (0,0)
Let the point of Focus be (0,40)
Base is at equal distance from the ground and the focus that is the vertex is at (h,k) = (0,20)
Equation of satellite can be obtained as:
(x - h)² = 4a(y - k)
as (h,k) = (0,20) , a=20
(x - 0)² = 4(20)(y - 20)
x² = 80( y - 20)
x² = 80y - 1600
y = (x²/80) + 20
4x^2 -3x -9=0
a=4
b=-3
c=-9
so D is the correct answer
Answer:
Step-by-step explanation:
1. Using the point of intersections, we use the substitution method to find the coordinates of the line parallel to
substituting the value of y in :
substituting x=-1 in y= -4-5x:
(upon solving, you should get this)
2. Using y=mx+c and making y the subject of the formula 2x-y-9=0 and using the coordinate we found earlier, we will find the equation of the parallel line. (We make y the subject of the formula to find the gradient)
-1= 2 x 1 +c
-3=c
N/3 +2 > 0 subtract 2 from both sides.
n/3 > -2 Multiply both sides by 3.
n > -6
The probability that any given car will have a brake failure if it is make a is 0.0065%
<h3>How to determine the probability?</h3>
The complete question is added as an attachment
From the table in the question, we have:
P(Brake failure|car a) = 0.0065%
The above represents the required conditional probability
Hence, the probability that any given car will have a brake failure if it is make a is 0.0065%
Read more about probability at:
brainly.com/question/2479210
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