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klasskru [66]
3 years ago
11

Mary wants to buy a small fence place around us semi circular garden demeanor of a semi circle is 18 feet Mary calculus that sh

e needs of about 28.3 feet of fence use a drop down menu to explain whether or not Mary's reasoning is correct use 3.4 for pie
Mathematics
1 answer:
nevsk [136]3 years ago
6 0

Diameter of a semi circular garden = 18 feet

Radius of the garden :

=  \tt\frac{diameter}{2}

=\tt  \frac{18}{2}

=\tt 9 \: feet

Thus, the radius of the semi circular fence = 9 feet

We know that :

\color{hotpink}\tt \: Circumference \: of \:a \:  semi \: circle \color{plum}=\pi r

Which means, the circumference of Mary's semi circular garden :

=\tt \pi r

(pi value = 3.14)

= \tt3.14 \times 9

=\tt 28.26 \: \:  feet

Thus, the circumference of fence needed for the semi circular garden = 28.26 feet

28.26 can be rounded off to 28.30 and 28.30 is the same as 28.3

Thus, Mary's reasoning is correct.

Therefore, Mary's reasoning is correct which means she needs 28.3 feet of fence to surround her garden.

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sergij07 [2.7K]

Given:

x is a number between 8 and 12 exclusive.​

To find:

The value of x.

Solution:

It is given that x is a number between 8 and 12 exclusive.​ It means the value of x lies between 8 and 12 but 8 and 12 are not included.

8

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6 0
3 years ago
Write the following<br> number in scientific<br> notation.<br> .00078
Aliun [14]

Answer:

7.8 × 10^-4

Step-by-step explanation:

Although this answer is perfectly O.K., most commonly the base, or the 0.00078, is written as a number with just one digit to the left of the decimal.

To format your number in this way, we'll multiply the .00078 by 10, 4 time(s), making it a 7.8.

We do this, because each multiplication by 10 moves the decimal point to the right one digit.

But in order to keep our number the same number, we must have a × 10-4 next to the 7.8.

So, the final answer is 7.8 × 10^-4

4 0
3 years ago
The Johnsons bought 3 burrito meals and 4 taco meals for $48. The Sloans bought 6 burrito meals and 2 taco meals for $60. How mu
faust18 [17]

Answer:

Each burrito meal cost 8$

Each taco meal cost 6$

Step-by-step explanation:

Johnsons= 3b +4t =48

Sloans= 6b+2t=60

multiple johnsons by -2

so, now the johnsons are -6b+-8t=-96

add that to the sloans so, -6b+6b-8t+2t=-96+60

the b's cancel eachother out, so you are left with -6t= -36

divide each side by -6 and you will get t=6

then you can pick either formula, lets say sloans this time

so, 6b + 2(6)=60 so, 6b+12=60, subtract 12 from each side, to get 48

so 6b=48, divde each side by 6 and you will get b=8

7 0
3 years ago
A point of symmetry is a point around which a shape can be rotated without changing any of its characteristics. A. True B. False
frozen [14]

Answer:

The answer is A. True

Step-by-step explanation:

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3 years ago
What is the square root of 61 to the nearest integer?<br> A. 7 <br> B. 31 <br> C. 8 <br> D. 9
gregori [183]
Square root of 61 it is something like 7.8 so the nearest integer is C.8  :))
8 0
3 years ago
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