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3 years ago

Help ! im giving good reviews to good answers.

Mathematics

2 answers:

kozerog [31]3 years ago

8 0

Answer:

The answer is 81.64 square m2

Step-by-step explanation:

All you have to do to find the circumference of a circle, is to, multiply 3.14 x 13(the radius) x 2 to get your answer.

Alex3 years ago

6 0

Answer:

81.68

hope this helps

have a good day :)

Step-by-step explanation:

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How to simplify 3²y×3⁴y?

algol13

Step-by-step explanation:

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2 years ago

2. The diagram shows some steps.<br> Find the volume in cm^3 and surface area in cm^2.

aleksley [76]

Step-by-step explanation:

Volume= [(20+20) x (20+20) x 100] - (20 x 20 x 100)

=120000cm^3

surface area= 2 x 40 x 100 + 2 x (40 x 40 - 20 x 20) + 4 x 20 x 100

=18400cm^2

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3 years ago

Read 2 more answers

Whats 19,174 rounded to the nearest thousand

satela [25.4K]

19,000

Step-by-step explanation:

round down if the hundred is above 5 than round up one number

4 0

3 years ago

Battery wholesaler produces 5200 batteries. Of those batteries produced, 8% are defective. How many batteries are defective?

Nitella [24]

Answer:

416

Step-by-step explanation:

1% of 5200 is 52

So 52 x 8 = 416

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3 years ago

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A new movie is released each year for 14 years to go along with a popular book series. Each movie is 2 minutes longer than the l

-Dominant- [34]

Answer:

Step-by-step explanation:

If you use the general equation for an arithmetic sequence,

$a_{n}=a_{1}+d(n-1)$ ,

where aₙ is the number of minutes for movie n,

a₁ is the length of the first movie in minutes, and

d is the difference between each movie, in minutes

Our sequence is this:

$a_{n}=70+2(n-1)$

If we want the length of the second movie (we already know the length of the first), we fill in n with 2:

$a_{2}=70+2(2-1)$

which gives us a length of 72. Now for the length of movie n = 3:

$a_{3}=70+2(3-1)$

which gives us a length of 74. Now for the length of movie n = 4:

$a_{4}=70+2(4-1)$

which gives us a length of 76. One more and I'm sure you'll notice the pattern:

$a_{5}=70+2(5-1)$

which gives us a length of 78. Now we will find the length of the 14th movie and add up by 2's all the way up to that number of minutes:

$a_{14}=70+2(14-1)$

which gives up a length of 96 minutes. We will add up by 2's from 70 to 96:

$70+72+74+76+78+80+82+84+86+88+90+92+94+96=1,162 min$

5 0

4 years ago