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Rzqust [24]
3 years ago
7

What is the area of a circle, if it's radius is 2cm?

Mathematics
1 answer:
slega [8]3 years ago
8 0
25.13cm^2 or 8pi. The radius of a circle is 2 x pi x r^2. R is the radius. 2 x pi x 2^2cm -> 2 x pi x 4cm -> 8cm x pi -> 25.13cm^2. Leaving the answer in terms of pi would be 8pi.
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3. There were 15,876 fans at the first MLS soccer game and 13,759 at the second game. How many more fans were at the first game?
laila [671]

Answer:

2117 more fans

Step-by-step explanation:

So, all you do is just subtract 15,876 from 13,759, which gives 2117 more fans.

Hope I helped !!!

5 0
3 years ago
Simplify.<br> -12 + (-2)(3)
sammy [17]

Answer:

-18

Step-by-step explanation:

-12 + (-2)(3)

= (-12)+((-2)x(3))

= (-12)+(-6)

= (-12)-(6)

= -18

8 0
3 years ago
Simplify<br> Enter answer in box:
lesantik [10]

(3/5 + -1/4)/(7/10)

get a common denominator of 20

3/5 * 4/4 =12/20

-1/4 * 5/5 = -5/20

7/10 *2/2 = 17/20

replace

(12/20 - 5/20)/(14/20)

add the top

(7/20)/(14/20)

copy dot flip

7/20 * 20/14

7/14

1/2


7 0
3 years ago
Read 2 more answers
Apple launches an ad campaign for iPhone 12. Managers want to know what is the % of social media mentions that have positive rea
Orlov [11]

Answer:

social media mentions do managers at Apple need to collect, if they want to get a margin of error of 2%

Sample size 'n' = 625

Step-by-step explanation:

<u><em>Step(i)</em></u>:-

Given data Apple launches an ad campaign for iPhone 12

Managers want to know what is the % of social media mentions that have positive reactions to the new ad campaign

probability of positive reactions p = 1/2

Probability of negative reactions q = 1-p = 1/2

we know that \sqrt{p(1-p}\leq \frac{1}{2}

<u><em>Step(ii):</em></u>-

Given margin of error  = 2 % =0.02

The margin of error is determined by

          M.E = \frac{\sqrt{p(1-p} }{\sqrt{n} }

         0.02 = \frac{\frac{1}{2}  }{\sqrt{n} }

        \sqrt{n} =\frac{1}{2 X0.02}

        √n = 25

squaring on both sides, we get

       n = 625

8 0
3 years ago
Luci and her friends go out to lunch and receive a bill for their meals that reads $56.80. How much would the
Liono4ka [1.6K]

Answer:

$68 and $10.792

Step-by-step explanation:

The computation is shown below:

The total bill received by them is $56.80

The total bill after adding 19% tip is

= Total bill + tip amount

= $56.80 + 19% of $56.80

=$56.80 + $10.792

= $67.592

= $68

The sever would make the amount i.e. equivalent to the tip amount i.e $10.792

6 0
3 years ago
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