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sineoko [7]
3 years ago
7

(Had to re-upload - Chose the wrong picture and couldn't edit.

Mathematics
1 answer:
maks197457 [2]3 years ago
5 0
7.1

Use pythogoras theorem to obtain the answer.
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What is the area of the circle below, in terms of ?90 metersO 457O 907O 1807O 81007134
defon

Step 1: Write out the formula

\begin{gathered} \text{Area of a circle = }\pi r^2 \\ \text{where } \\ r=\text{ the radius of the circle} \end{gathered}

Step 2: Write out the given values and substitute them into the formula

r=90m

Therefore,

\text{ the area of the circle = }\pi(90)^2=\pi\times8100=8100\pi m^2

Hence, the area in terms of pi is

8100\pi

The last choice is the correct answer

3 0
1 year ago
Sin^2 (theta)-cos^2 (theta)=0
yanalaym [24]
Hope this helps you.

8 0
3 years ago
What is 18k + 30fk in like terms. Will give brainliest to correct answer.
oee [108]

Answer:

6k(5f+3)

Step-by-step explanation:

18k+30fk

Factor out 6.

6(3k+5fk)

Consider 3k+5fk. Factor out k.

k(3+5f)

Rewrite the complete factored expression.

6k(5f+3)

4 0
3 years ago
Read 2 more answers
A random sample of 11 fields of rye has a mean yield of 20.1 bushels per acre and standard deviation of 7.66 bushels per acre. D
Lady bird [3.3K]

Answer:

17.1≤x≤23.1

Step-by-step explanation:

The formula for calculating the confidence interval is expressed as;

CI = x ± z*s/√n

x is the mean yield = 20.1

z is the 80% z-score = 1.282

s is the standard deviation = 7.66

n is the sample size =  11

Substitute

CI = 20.1 ± 1.282*7.66/√11

CI = 20.1 ± 1.282*7.66/3.3166

CI = 20.1 ± 1.282*2.3095

CI =  20.1 ±2.9609

CI = (20.1-2.9609, 20.1+2.9609)

CI = (17.139, 23.0609)

hence the required confidence interval to 1dp is 17.1≤x≤23.1

8 0
3 years ago
If the equation y = 1/3 x + 2 is changed to y = 3x + 2, what will be true about the graph of the equation?
Anna11 [10]
That would be D) The slope of the graph will be changed.
I hope it helps
4 0
3 years ago
Read 2 more answers
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