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Sonja [21]
3 years ago
10

An animal park has lion,tigers and zebras.30% of the animals are lion and half the animals are zebras.If there are 120 animals a

t the park,how many lions are there
Mathematics
1 answer:
arsen [322]3 years ago
8 0
120×30/100=36
36 lions if there are 120 animals
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You measure 25 turtles' weights, and find they have a mean weight of 31 ounces. Assume the population standard deviation is 12.8
Firlakuza [10]

Answer:

Margin of error = 4.21 ounces  

Step-by-step explanation:

According to the Question,

  • Given That, You measure 25 turtles' weights, and find they have a mean weight of 31 ounces. Assume the population standard deviation is 12.8 ounces

Therefore, Sample mean = 31 ounces  ,  Sample size(n) = 25 , Alpha(α) = 0.10 & Population standard deviation(σ) = 12.8 ounces

  • Thus, Margin of error  = Z_{critical} × σ / √n  (Z_{critical} at α=.010 is 1.645)

Putting The Values, We get

1.645 × (12.8 / √25 ) ⇒ 4.2112 ≈ 4.21

Thus, the maximum margin of error associated with a 90% confidence interval for the true population mean turtle weight is 4.21 ounces

8 0
3 years ago
For X, (3x-40°)=2x-10°)​
KATRIN_1 [288]

Hello!

3 x - 40^0 = 2 x - 10^0

3 x - 1 = 2 x - 1

3 x = 2x

3 x - 2 x = 0

Hence, the answer is 0

I hope this helps, and have a nice day!

4 0
3 years ago
What's the simplified form of this expression? 3-[-2/3 x (7 +2) =11]
svetoff [14.1K]

Answer:

x = 4/3

Step-by-step explanation:

7 0
3 years ago
An engineer estimated the weight of a steel beam to be 600 pounds. The actual weight of the beam was 639 pounds. Find the absolu
mario62 [17]

Answer:

Absolute error = 39

Percent Error = 6.10%

Step-by-step explanation:

Actual value = 639 pounds

Observed Value = 600 pounds

The formula to find absolute error is:

Absolute Error = Actual value - Observed Value

                        = 639 - 600

                        = 39

The formula to find Percent error is:

Percent Error = (Actual value - Observed Value / Actual value)*100

                       = (639 - 600/639)*100

                       = 6.10%

                 

7 0
3 years ago
Read 2 more answers
0.5 0.45 0.405 4.5 least to greatest
babymother [125]
0.405, 0.45 , 0.5 , 4.5 : Least to greatest!
5 0
3 years ago
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