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IrinaVladis [17]
3 years ago
15

6. I need help I don't know the answer

Mathematics
1 answer:
12345 [234]3 years ago
5 0
There you hope s this help

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Find the total surface area of this cone. Round to the nearest tenth.
leva [86]

Step-by-step explanation:

for given cone:

h = 3 ft, r = 3 ft

Let l be the Slant height of cone.

\therefore \: l =  \sqrt{ {h}^{2}  +  {r}^{2} }  \\  =  \sqrt{ {3}^{2} +  {3}^{2}  }  \\  =  \sqrt{9 + 9}  \\  =  \sqrt{2 \times 9}  \\   \therefore \: l= 3 \sqrt{2}  \: ft \\  \\ total \: surface \: area \: of \: cone \\  = \pi \: r(l + r) \\  = 3.14 \times 3(3 \sqrt{2}  + 3) \\  = 9.42 \times 3( \sqrt{2}  + 1) \\  = 28.26 \times (1.414 + 1) \\  = 28.26 \times 2.414 \\  = 68.21964 \\  \approx \: 68.2 \:  {ft}^{2}

8 0
3 years ago
Three times the sum of a number and five is thrity-six? What is the number
andrew11 [14]
The number is 12.

7 + 5 = 12

12 • 3 = 36

Hope I helped!
5 0
2 years ago
What is 9.66 rounded to the nearest tenth
KatRina [158]

the number is 6 so we round up to 9.7 s


I hope that help .

5 0
3 years ago
Read 2 more answers
Antonia is keeping track of the number of pages she reads. She started the school year having already read 95 pages her book, an
cupoosta [38]
F(x) means "function of" and x represents the day number, example: day 6 would be f(6)=(20×6)+95
4 0
3 years ago
A map of an island is shown on a half-centimetre grid,
SOVA2 [1]

Answer:

The answer is b.

Step-by-step explanation:

4 0
3 years ago
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