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mr Goodwill [35]
3 years ago
5

Can anybody help me out with this please

Mathematics
1 answer:
iris [78.8K]3 years ago
5 0
Area of table would be needed for glass.
Formula for area of a circle: A=π r^2

A=3.14(30)^2
A=3.14 x 900
A = 2826 inches^2

Answer is C
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Kira owes Mark $5, and Mark owes Kira $7. Which of the following statements means the same thing?
S_A_V [24]

Answer:

They both owe each other

Step-by-step explanation:

7 0
3 years ago
Question 11<br><br> (-10) + (10) = ??<br> A)20<br> B)-20<br> C)-0<br> D)0
Nastasia [14]

Answer:

0

Step-by-step explanation:

-10 + 10

-10 and 10 are additive inverses, so when we add them, it is equal to zero

-10 + 10 = 0

6 0
3 years ago
Random variables X Poisson~ ( a) ,Y Poisson ~ ( a) . X and Y are independent. If 2 1, 2 1. U =2X+ Y-1, V=2X- Y +1. Find: ) Cov (
german

By definition of covariance,

\mathrm{Cov}(U,V)=E[(U-E[U])(V-E[V])]=E[UV-E[U]V-UE[V]+E[U]E[V]]=E[UV]-E[U]E[V]

Since U=2X+Y-1 and V=2X-Y+1, we have

E[U]=2E[X]+E[Y]-1

E[V]=2E[X]-E[Y]+1

\implies E[U]E[V]=(2E[X]+E[Y]-1)(2E[X]-(E[Y]-1))=4E[X]^2-(E[Y]-1)^2=4E[X]^2-E[Y]^2+2E[Y]-1

and

UV=(2X+Y-1)(2X-(Y-1))=4X^2-(Y-1)^2=4X^2-Y^2+2Y-1

\implies E[UV]=4E[X^2]-E[Y^2]+2E[Y]-1

Putting everything together, we have

\mathrm{Cov}(U,V)=(4E[X^2]-E[Y^2]+2E[Y]-1)-(4E[X]^2-E[Y]^2+2E[Y]-1)

\mathrm{Cov}(U,V)=4(E[X^2]-E[X]^2)-(E[Y^2]-E[Y]^2)

\mathrm{Cov}(U,V)=4V[X]-V[Y]=4a-a=\boxed{3a}

7 0
4 years ago
Which pair of angles are vertical angles?
lesya692 [45]

Answer:

Vertical angles are angles opposite of each other. hope it helps

7 0
2 years ago
Read 2 more answers
The radius of a circular track is 0.2 miles ellie ran around the track 3 times how many kilometers round to the nearest whole mi
balu736 [363]

Answer:

4 miles to the nearest mile.

Step-by-step explanation:

Circumference of the track = 2 pi r

= 2*pi*0.2 = 1.257  miles

Ellie ran 3 times around the track so

the distance she ran is 3* 1.257

=  4 miles

6 0
3 years ago
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