Answer:
Step-by-step explanation:
Since sample size is small and population std dev is not known, t test should be used.
p value = 0.135849
Since p>0.05 we accept that samples have a mean equal to 2533mm
There is no sufficient evidence to support the claim that the boards are either too long or too short
Answer:
The region between a chord and either of its arcs is called a segment the circle.
Angles in the same segment of a circle are equal.
Step-by-step explanation:
Let bisectors of angles A, B and C of a triangle ABC intersect its circumcircle at D, E and F .
Now from figure,
∠D = ∠EDF
∠D = ∠EDA + ∠ADF
Since ∠EDA and ∠EBA are the angles in the same segment of the circle.
So ∠EDA = ∠EBA
Hence ∠D = ∠EBA + ∠FCA
Again ∠ADF and ∠FCA are the angles in the same segment of the circle.
hence ∠ADF = ∠FCA
Again since BE is the internal bisector of ∠B and CF is the internal bisector of ∠C
So ∠D = ∠B/2 + ∠C/2
Similarly
∠E = ∠C/2 + ∠A/2
and
∠F = ∠A/2 + ∠B/2
Now ∠D = ∠B/2 + ∠C/2
=∠D = (180 - ∠A)/2
(∠A + ∠B + ∠C = 180)
∠D = 90 - ∠A/2
∠E = (180 - ∠B)/2
∠E = 90 - ∠B/2
and ∠F = (180 - ∠C)/2
∠F = 90 - ∠C/2
A(n) = a(n-1)+9 means that we add 9 to the previous term to get the next term. Therefore the common difference is d = 9 this sequence is arithmetic.
The first term is a(1) = 21
Plug those two values into the arithmetic formula below and simplify
a(n) = a(1) + d * [ n - 1 ]
a(n) = 21 + 9 * [ n - 1 ]
a(n) = 21 + 9*n + 9*(-1)
a(n) = 21 + 9n - 9
a(n) = 9n+12
Answer is choice D
20 ÷ 5 = 4 IDK how else to explain it, you just need a calculator
Answer:
The problem is stupidly written but the intercepts are:
(0 ,+/-625.02)
(+/-625.02, 0)
Radius is 625.02
Area 1,227,263.17 square miles
Step-by-step explanation:
