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san4es73 [151]
3 years ago
14

The second hand on a clock is 8 cm,long.

Mathematics
1 answer:
enot [183]3 years ago
8 0

Answer:

Total Distance = 8.37 cm

Step-by-step explanation:

D = π2r

D = π2(8)

D = 16 π

D = 50.24

T = 60 = 1hr

T = 60/10 = T x D = 1/6 x 50.24

Total D = 8.37 cm

Alternative is we can take 1/6 as a decimal = 0.1666 x 50.24 = 8.37 cm

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12+4y^2-7<br><br><br> please help i will give brainliest
Dennis_Churaev [7]

Answer: 4 2^ + 5

Step-by-step explanation:

;w;

8 0
3 years ago
What is a unique polygon?
Alex777 [14]
The Unique Shape Theorem states that all regular polygons with the same number of sides are similar to each other. And the immediate result of this theorem is that there is one unique shape for them.
3 0
3 years ago
A person on the ground looks up at an angle of 28° and sees the top of a tree and the top of a building aligned. The tree is 20
lorasvet [3.4K]

Answer:

21.27 meters.

Step-by-step explanation:

Please find the attachment.

Let H and h represent height of building and tree respectively.

We have been given that a person on the ground looks up at an angle of 28° and sees the top of a tree and the top of a building aligned. The tree is 20 m away from the person and the building is 60 m away from the person.

We know that tangent relates opposite side of a right triangle with its adjacent side.

\text{tan}=\frac{\text{Opposite}}{\text{Adjacent}}

\text{tan}(28^{\circ})=\frac{H}{60}

60\cdot \text{tan}(28^{\circ})=H

60\cdot 0.531709431661=H

H=31.90256589966\approx 31.90

Similarly, we can find height of the tree.

\text{tan}(28^{\circ})=\frac{h}{20}

20\cdot\text{tan}(28^{\circ})=h

20\cdot 0.531709431661=h

h=10.63418863322\approx 10.63

H-h=31.90-10.63

H-h=21.27

Therefore, the difference in heights between the building and tree is 21.27 meters.

3 0
3 years ago
The difference of three times Faye's age and four times Joshua's age is 31. If Faye's age is five more than twice Joshua's age,
Vera_Pavlovna [14]
She is 31

F-Faye
J-Joshua

F3-J4=31
F=J2+5
(J2+5)(3)-J4=31
J2+5=31
J2+5-5=31-5
J2=26
J2/2=26/2
J=13

F=13(2)+5
F=26+5
F=31
5 0
3 years ago
Help me please! I would appreciate it! :)
zheka24 [161]

Answer:

-4

Step-by-step explanation:

distributing gets you to : 8h + 38 = -18 - 6h

then add 6h to 8h and you have 14h + 38 = -18

solve normally & thats how you get your answer

8 0
2 years ago
Read 2 more answers
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