Answer:
725.71 cm
Step-by-step explanation:
Using the attached diagram :
Diameter of inner circle = 26
Radius of inner circle = 26/2 = 13
Radius of entire circle = 13 + 7 = 20
The Area of a circle = πr²
Area of inner circle = π13² = 169π
Area of entire circle = π20² = 400π
Area of shaded portion :
Area of entire circle - Area of inner circle
400π - 169π = 231π = 725.71 cm
Answer:
(-0.6 , -5.2)
Step-by-step explanation:
4x-2y=8
y=12x+2
just graph the line of each equation of the system and then locate the
intersection point
the coordonates of that point are pair solutio to the system
check the picture below for the graph.
:)
Answer:
We could say 10
Step-by-step explanation:
1) Remove unneeded info
2) Divide the length by the distance between posts
68/7
3) Will give you a decimal but ro7nd up to 10
Answer:
A) Professor A failure proportion = 0.12 ; B) Average = 0.1 ; C) σ = 0.055
Step-by-step explanation:
1) Proportion of failures for Prof A : Failure / Total
= 12 / 100 = 0.12
2) Proportion of failures for Prof B : 1/ 100 = 0.01
Proportion of failures for Prof C : 11 / 100 = 0.11
Proportion of failures for Prof D = 16 / 11 = 0.16
Average proportional failure for all instructors :-
[ Prop (prof A) + Prop (prof B) + Prop (prof C) + Prop (prof D) ] / 4
(0.12 + 0.01+ 0.11 + 0.16 ) / 4 = 0.4 / 4 = 0.1
3) Standard Deviation (σ) = √ Σ (x - x')^2 / n , where x' = mean = 0.1
x x - x' (x - x')^2
0.12 0.02 0.0004
0.01 -0.09 0.0081
0.11 0.01 0.0001
0.16 0.06 <u>0.0036 </u>
<u>Σ = 0.0122</u>
σ = √ 0.0122/ 4 = √0.00305 = 0.055
