Answer:
d=1.416.525 mile
Step-by-step explanation:
V1=5151m/h, t1=t, V2=7575m/h, t2=t-88h
d1=d2 Because it is same distance; V1=d1/t and V2=d2/(t-88) but d1=d2
d=V1t=V2(t-88) → 5151t=7575(t-88) → 5151t=7575t-666.600 → 7575t-5151t=666.600 → 2424t=666.600 → t=666.600/2424 → t=275h so
The equation of the parabola in vertex form
Given :
vertex (3,2), point (2,-4)
The vertex form of parabola is
Where (h,k) is the vertex
Given vertex is (3,2). so, h=3 and k=2
Replace it in the equation
Now we find out the value of 'a' using the given point (2,-4)
Point (2,-4) is (x,y)
x=-2 and y=-4
Replace it in the equation we got to find out 'a'
the equation of the parabola in vertex form
Learn more : brainly.com/question/9030390
Answer:
(A) Mean = 84
(B) Variance = 118.714
(C) Standard deviation = 10.89
Step-by-step explanation:
Data provided:
number of observations, n = 15
sample of 15 costco customer satisfaction scores follow
X
95 11 121
90 6 36
83 -1 1
64 -20 400
95 11 121
98 14 196
80 -4 16
83 -1 1
82 -2 4
93 9 81
86 2 4
80 -4 16
94 10 100
75 -9 81
62 -22 484
================================================
∑X = 1260 ∑= 1662
Now,
(A) Mean =
or
Mean = = 84
(B) Variance =
or
Variance =
or
Variance = 118.714
(C) Standard deviation = √Variance = √118.714 = 10.89