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Mrac [35]
3 years ago
9

Find the area of a square if its sides measure 2 2/3m

Mathematics
1 answer:
olga55 [171]3 years ago
6 0

Answer:

7\dfrac{1}{9}\ m^2

Step-by-step explanation:

If the length of the square side is a units, then the area of the square is

A=a^2\ un^2.

In your case, the side length is

a=2\dfrac{2}{3}\ m,

then the area is

A=2\dfrac{2}{3}\cdot 2\dfrac{2}{3}\\ \\ \\A=\dfrac{2\cdot 3+2}{3}\cdot \dfrac{2\cdot 3+2}{3}\\ \\ \\A=\dfrac{8}{3}\cdot \dfrac{8}{3}\\ \\ \\A=\dfrac{64}{9}\\ \\ \\A=7\dfrac{1}{9}\ m^2

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BRAINLIEST ANSWER TO FIRST ANSWERER!!
Natalija [7]

Answer:

13 cms

Step-by-step explanation:

By Pythagoras:-

x^2 = 12^2 + 5^2

x^2 = 144 + 25

x^2 = 169

x  = √169

= 13

5 0
3 years ago
Yoshua borrowed $8,000 from his credit union over 9 months. He pays a simple interest of
ollegr [7]

Answer:

simple prt. $720

Step-by-step explanation:

4 0
3 years ago
"twelve diminished by six times a number
Mnenie [13.5K]
The answer to the problem is 12-6x
7 0
3 years ago
A researcher wants to estimate the percentage of all adults that have used the Internet to seek pre-purchase information in the
Lubov Fominskaja [6]

Answer:

The required sample size for the new study is 801.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

25% of all adults had used the Internet for such a purpose

This means that \pi = 0.25

95% confidence level

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

What is the required sample size for the new study?

This is n for which M = 0.03. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.03 = 1.96\sqrt{\frac{0.25*0.75)}{n}}

0.03\sqrt{n} = 1.96\sqrt{0.25*0.75}

\sqrt{n} = \frac{1.96\sqrt{0.25*0.75}}{0.03}

(\sqrt{n})^2 = (\frac{1.96\sqrt{0.25*0.75}}{0.03})^2

n = 800.3

Rounding up:

The required sample size for the new study is 801.

4 0
3 years ago
A number is multiplied by 5. If 12 is added to the product you get 37.
Korolek [52]


5x+12=37

5x=25

x=5

I hope this helps


5 0
3 years ago
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