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dsp73
3 years ago
13

The Ruffs are planning to buy an above-ground swimming pool shaped as a regular octagon. The radius of the octagon is 9 feet. To

the nearest tenth, find the area of the surface of the water in the pool.
Possible answers:

A) 458.2 ft2
B) 553.1 ft2
C) 94.8 ft2
D) 229.1 ft2
Mathematics
2 answers:
const2013 [10]3 years ago
8 0
Hello ,The answer is A
Ainat [17]3 years ago
7 0
Octagon can be split into 8 equal isosceles triangles Area of octagon will be 8X area of each triangle 360/8 = 45 top angle opposite of base is 45 degrees 180(8-2) = 1080, this is sum of interior angles 1080/8 = 135 135/2 = 67.5 bottom 2 angles opposite of radii are 67.5 degrees to find area of triangle we need base length(x) and height(h) use trig ratios h = 9sin(67.5) x = 18cos(67.5) Area = 8*(1/2)*(9sin(67.5))*(18cos(67.5)) Area = 648*sin(67.5)*cos(67.5) Area = 229.1
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Patty are is. 3 times audreys age plus 7. Party is 37. What is audreys age?
omeli [17]

Answer:

19

Step-by-step explanation:

37/3= 12. something

12+7+19

4 0
3 years ago
-1/2=y-1 <br> I don’t understand this
Greeley [361]
You would add 1 to both sides to get the y alone on the right side. Then it would be y = 1+ -1/2 which is y = 1/2. Hope you understand better!
8 0
3 years ago
At the dealership where she works, Sade fulfilled 3/10 of her quarterly sales goal in January and another 1/10 of her sales goal
skelet666 [1.2K]

Hi There!

----------------------------------------

Problem #1:

At the dealership where she works, Sade fulfilled 3/10 of her quarterly sales goal in January and another 1/10 of her sales goal in February. What fraction of her quarterly sales goal had Sade reached by the end of February?

3/10 + 1/10 = 4/10

4/10 of her goal.

----------------------------------------

Problem #2:

Shane has been monitoring his mileage. According to last week's driving log, he drove 1/10 of a mile in his car and 9/10 of a mile in his truck. How far did Shane drive last week in all?

1/10 + 9/10 = 10/10 = 1

Shane drove 1 mile.

----------------------------------------

Problem #3:

For a class experiment, Vina's class weighed a log before and after subjecting it to termites. Before subjecting it to termites, the log weighed 7/10 of a pound. After the termites, the log weighed 3/10 of a pound. How much weight did the termites take from the log?

7/10 - 3/10 = 4/10

The termites took 4/10 pound away from the log.

----------------------------------------

Hope This Helps :)

6 0
3 years ago
What is seven times the quotient of five and seven?( help fill in the blanks too plz )
MrRa [10]

Answer:

7÷5

1.4×5

Solution

7÷5=1.4

1.4×5=7

3 0
3 years ago
Please help me &gt;_&lt; will give out brainliest
ryzh [129]
<h3>Answer:  1080</h3>

====================================================

Explanation:

We have an octagon because there are n = 8 sides. The diagram below shows one way to number the sides so you can count them efficiently (without missing any or double counting any).

----------------

Plug n = 8 into the formula below

S = 180(n-2)

S = 180(8-2)

S = 180(6)

S = 1080

The 8 interior angles add up to 1080 degrees.

8 0
3 years ago
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