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son4ous [18]
3 years ago
13

Help pls I will give brainliest! 6

Mathematics
1 answer:
VashaNatasha [74]3 years ago
5 0

Answer:

8. 822

9. 1582

10. 1936

11. 8200

Step-by-step explanation:

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A cat falls out of a tree and takes 1.4 seconds to land safely on its paws on the ground how many meters did the cat fall ?
lutik1710 [3]
To solve this, we are going to use the distance of a free fallen object: d=0.5gt^2
where
d is the distance 
g is the gravity of the Earth 9.8m/s^2
t is the time in seconds 

We know form our problem that a cat falls out of a tree and takes 1.4 seconds to land, t=1.4. Lets replace that value in our formula to find d:
d=0.5gt^2
d=0.5(9.8)(1.4)^2
d=9.604 meters 

We can conclude that the cat fell a distance of 9.604 meters.
7 0
3 years ago
What is the value of the expression f2 + 8 if f = 7?
Ilia_Sergeevich [38]
If the values are placed right next to each other without a symbol, then you multiply them. 
So, you multiply the value of 7 with 2, since they are placed right next to each other. 
(7x2) + 8 = 14 + 8 = 22
4 0
3 years ago
Read 2 more answers
Kristina paid $9.15 for 5 pounds of pears.
11Alexandr11 [23.1K]

Answer:

B .The pears because they cost $0.20 less

per pound.

8 0
2 years ago
The​ half-life of​ carbon-14 is 5600 years. If a piece of charcoal made from the wood of a tree shows only 66​% of the​ carbon-1
xz_007 [3.2K]

The tree died about 3357 years ago.

Explanation:

The half life of carbon - 14 is given by

A(t)=A(0)e^{-kt}

where A(t)=0.5

A(0)=1

t=5600

Substituting these values in the above equation, we get,

0.5=1e^{-5600k}

Taking In on both sides of the equation, we get,

   In(0.5)=-5600k

      \frac{In(0.5)}{-5600} =k

0.00012377=k

Since, only 66% of Carbon - 14 remains after the time T.

Thus, we have,

0.66=1e^{-kT}

Taking In on both sides of the equation, we get,

  In(0.66)=-0.00012377 \ T

\frac{In(0.66)}{-0.00012377} =  T

        3357=T

Thus, the tree died about 3357 years ago.

6 0
3 years ago
What is the mean average<br> 14, 12, 9, 2, 3, 1, 1<br><br> 10,10,10,5,9,12,12,24,8,31,3,10
Orlov [11]

Answer:

20.89

Step-by-step explanation:

x f fx

1 6 6

2 4 8

3 5 15

4 3 12

5 3 15

6 2 12

8 1 8

9 2 18

10 4 40 average=fx/f

12 3 36 = 961/46

14 2 28 = <u>20.89</u>

19 1 19

24 1 24

26 1 26

31 1 31

32 1 32

56 1 56

67 1 67

100 1 100

102 1 102

150 1 150

156 1 156

total: <em>46</em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>961</em>

5 0
3 years ago
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