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3 years ago

The radius of a circle is 3 in. Find its area to the nearest tenth.

Mathematics

2 answers:

guapka [62]3 years ago

5 0

Answer:

28.27 in²

Step-by-step explanation:

A= π r² = π · 3² ≈ 28.27433in²

rounded: 28.27in²

hope this helped!

aalyn [17]3 years ago

3 0

Steps:

Shape: Circle

Solved for area

Radius: 3 in

Formula: A=πr2

Description:

Using the formula for the area A=πr2. We calculate the area of a circle. Your answer will come as A≈28.27in² after calculating. Round it up to the nearest tenth = 28.27. So it will be the same number when you round it.

Answer: A≈28.27in²

Nearest tenth = 28.27

Please mark brainliest

Hope this helps.

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3 years ago

a cell phone company plans to market a new smartphone. they have already sold 612 units durning the first week of the campaign.

Vadim26 [7]

The first term is 612.

The common ratio is 1.08 and

The recursive rule is $a_{n} = a^{n-1} \times r$

Step-by-step explanation:

the question to the problem is to write the values of the first term, common ratio, and expression for the recursive rule.

The first term :

In geometric sequence, the first term is given as $a_{1}$ .

⇒ $a_{1} = 612$

Now, the geometric sequence follows as 612, 661, ........

The common ratio (r) :

It is the ratio between two consecutive numbers in the sequence.

Therefore, to determine the common ratio, you just divide the number from the number preceding it in the sequence.

⇒ r = 661 divided by 612

⇒ r = 1.08

To find the recursive rule :

A geometric series is of the form a,ar,ar2,ar3,ar4,ar5........

Here, first term $a_{1} = a$ and other terms are obtained by multiplying by r.

Observe that each term is r times the previous term.
Hence to get nth term we multiply (n−1)th term by r .

The recursive rule is of the form $a_{n} = a^{n-1} \times r$

This is called recursive formula for geometric sequence.

We know that r = 1.08 and $a_{1}$ = 612.

To find the second term $a_{2}$ , use the recursive rule $a_{n} = a^{n-1} \times r$

⇒ $a_{2} = a^{2-1}\times r$

⇒ $a_{2} = a^{1}\times r$

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3 years ago

What's the area of a rectangle measuring 13in × 12in

slamgirl [31]

Hey there
Your answer is 156 hope it helps:)
- Maddie

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3 years ago

Read 2 more answers