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vodka [1.7K]
3 years ago
9

The radius is 3 so what is the circumference

Mathematics
2 answers:
V125BC [204]3 years ago
4 0

Answer:

28.26 cm squared

Step-by-step explanation:

A = πr^2

A = π(3)^2

A = 9π

A = 9(3.14)

A = 28.26 cm squared

jonny [76]3 years ago
3 0
The formula for circumference of a circle
=
2
π
r
The radius
=
3
c
m
(assuming units to be in cm)
2
π
r
=
2
×
22
7
×
3
=
132
7
=
18.86
c
m
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What 42 rounded to the nearest ten​
Savatey [412]

Answer:

40

Step-by-step explanation:

the tens value is the 2 value from the left of a decimal point.

Examples: 32  67.4  2345 904

In your case, the tens value is 4

We need to look at the ones value to see if we need to round up or down

Because the ones value, 2, is less than 5, we keep the tens value, so it's 40

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The 17th term of an Arithmetic sequence is 51. If the commons difference is 7, what is the first term ?
vovikov84 [41]

Answer:

The first term is:

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Step-by-step explanation:

The arithmetic sequence is defined by

a_n=a_1+\left(n-1\right)d

where

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d is the common difference

as

the 17th term of an arithmetic sequence is 51.

i.e. a_{17}=51

so

a_n=a_1+\left(n-1\right)d

a_{17}=a_1+\left(17-1\right)d        

51=a_1+\left(17-1\right)7         ∵ n = 17, a_{17}=51 , d=7

a_1+112=51                   ∵ \left(17-1\right)\cdot \:\:7=112

a_1=-61

Therefore, the first term is:

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Step-by-step explanation:

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