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natali 33 [55]
3 years ago
8

Work out the surface area of this sphere?

Mathematics
1 answer:
Aleks [24]3 years ago
3 0

Answer:

84.9

Step-by-step explanation:

R²=2.6x2.6

   =6.76

6.76xπ=21.2264

21.2264x4=84.9056

Rounded to 84.9

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Answer:

1674831727833771724X

6 0
3 years ago
How many x-intercepts would the function shown below have?<br> f(x) = -5x (2x + 1)? (x² – 6)(x² + 9)
BabaBlast [244]

Step-by-step explanation:

Here we have

f

(

x

)

=

2

x

2

(

x

2

−

9

)

, which can be factorized as

f

(

x

)

=

2

x

2

(

x

+

3

)

(

x

−

3

)

As there is no common factor between numerator and denominator, there s no hole.

Further vertical asymptotes are

x

=

−

3

and

x

=

3

and as

f

(

x

)

=

2

x

2

(

x

2

−

9

)

=

2

1

−

9

x

2

, as

x

→

∞

,

f

(

x

)

→

2

, hence horizontal asymptote is

y

=

2

.

Observe that

f

(

−

x

)

=

f

(

x

)

and hence graph is symmetric w.r.t.

y

-axis. Further as

x

=

0

,

f

(

x

)

=

0

. Using calculas we can find that at

(

0

,

0

)

there is a local maxima as

d

y

d

x

=

−

36

x

(

x

2

−

9

)

2

and at

x

=

0

it is

0

. Further while for

x

<

−

3

and

x

>

3

, function is positive, for

−

3

<

x

<

3

function is negative.

Now take a few values of

x

say

{

−

10

,

−

7

,

−

4

,

−

2

,

−

1

,

1

,

2

,

4

,

7

,

10

}

and corresponding values of

f

(

x

)

are

{

2

18

91

,

2

9

20

,

4

4

7

,

−

1

3

5

,

−

1

4

,

−

1

4

,

−

1

3

5

,

4

4

7

,

2

9

20

,

2

18

91

}

5 0
3 years ago
EZ car rental charges $40 a day plus $0.25 per mile. ace rent-a-car charges $25 a day plus $0.45 per mile. what number of miles
Kitty [74]

Answer:

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Step-by-step explanation:


3 0
3 years ago
Use the distributive property to expand this expression: 3(-3a + 4) =
mylen [45]

Answer:

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Step-by-step explanation:

4 0
3 years ago
Is this Positive or Negative (3,528)(−17,438)(0)(−5,280)
Mekhanik [1.2K]

Answer:

Positive

Step-by-step explanation:

The negative and negative cancel each other out, and positive times positive is positive.

4 0
4 years ago
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