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Stells [14]
3 years ago
8

The formula below gives T, the approximate time in years it takes a population to double if the annual growth rate is r percent.

Mathematics
1 answer:
matrenka [14]3 years ago
4 0
The answer is 
T=70/r=70/<span> 24/100=100*70/24=7000/24=291.6
</span>T=<span>291.6</span>
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Please help with a math problem must show work.
Burka [1]

Answer:

B

Step-by-step explanation:

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3 years ago
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At a certain time of day, the angle of elevation of the sun is 40°. To the nearest foot,find the height of a tree whose shadow i
MrRa [10]
Answer: approximately 29 feet

Explanation: You need to find a tree so that the angle of elevation from the end of the shadow to top of the tree is 40 degrees.

The length of the shadow is an adjacent side and is 35.
The height of the tree is the opposite side.  You could use X.

Tan ratio = opposite/adjacent

tan(40) =  x/35
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5 0
3 years ago
What’s the answer for it
GuDViN [60]

Answer: Part 1: 111.24

Part 2: 9.27

Part 3: 54 minutes

Step-by-step explanation:

Part 1: Since you already know that the total bill increases by 3%, you just have to find 103% of 180.

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7 0
3 years ago
Sara took skydiving lessons. The Skydome charges $45 per hour for lessons. Sara also gave her Skydiving Instructor a tip of $20.
malfutka [58]

Answer:

45+20=t   t=65

Step-by-step explanation:

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Hope this helps

7 0
3 years ago
A Gallup poll showed that 30% of Americans are satisfied with teh way things are going in the United States. Suppose a sample of
weeeeeb [17]

Answer:

Mean of the binomial distribution  μ= 6

Variance of the binomial distribution  λ² = 4.2

Step-by-step explanation:

<u>Explanation:-</u>

The probability a Gallup poll showed that 30% of Americans are satisfied with the way things are going in the United States.

p = 30% = 0.3

q =1-p = 1- 0.3 =0.7

a sample of 20 Americans is selected as part of a study of the state of the nation  

size of the sample 'n' =20

we will use binomial distribution

<u>mean</u>:-

Mean of Americans who are satisfied with the way things are going in the United States                               (μ) = np

                                                     μ= 20 X 0.3

                                                    μ= 6

<u>Variance</u>:-

Variance of Americans who are satisfied with the way things are going in the United States                              λ² = n p q = 20 X(0.3)(0.7)

                                                         λ² = 4.2

4 0
3 years ago
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