3 years ago

Help please I have a test tomorrow it would be the best

Mathematics

1 answer:

zlopas [31]3 years ago

3 0

Divide each number by 3 to get the next number. The ratio is 1/3

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If I read 2/3 of a book that has 222 pages how many pages do I have left to read

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DinElla’s test grades in her history class are 89, 94, 82, 84, and 98. What score must Ella make on her next test to have a mean

KonstantinChe [14]

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A regular decagon has sides that are 8 cm long. What is the area of the figure? Round to the nearest whole number.

blsea [12.9K]

<u>Given</u>:

Given that the regular decagon has sides that are 8 cm long.

We need to determine the area of the regular decagon.

<u>Area of the regular decagon:</u>

The area of the regular decagon can be determined using the formula,

$A=\frac{s^{2} n}{4 \tan \left(\frac{180}{n}\right)}$

where s is the length of the side and n is the number of sides.

Substituting s = 8 and n = 10, we get;

$A=\frac{8^{2} \times 10}{4 \tan \left(\frac{180}{10}\right)}$

Simplifying, we get;

$A=\frac{64 \times 10}{4 (\tan \ 18)}$

$A=\frac{640}{4 (0.325)}$

$A=\frac{640}{1.3}$

$A=642.3$

Rounding off to the nearest whole number, we get;

$A=642 \ cm^2$

Thus, the area of the regular decagon is 642 cm²

Hence, Option B is the correct answer.

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3 years ago

Finding the expression

vekshin1

If you combine like terrms its easy, you just have to -5+5+6y, 6y=16 y=2.66666667

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4 years ago

What is one thousand minus on hundred and ten

Alexeev081 [22]

Answer:

The answer is 890 . ...... :D

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