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yan [13]
3 years ago
15

A boat has a speed of 5 mph in calm water. It takes the boat 3 hours to travel updtream but only 2 hours to travel the same dist

ance downstream. Using the data in the table, what is the value of c, the speed current?
Mathematics
1 answer:
N76 [4]3 years ago
8 0
<span>
2(5+c)=3(5-c) 
solve for c 
10+2c=15-3c 
5c=5
c=1</span>
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L42.54 is the same as 42 _____' 24".<br><br> Answer:
Ludmilka [50]
There are 60 ( ' ) minutes in 1 degree, and 60 ( " ) seconds in 1 minute.

now, on a Latitude of 42.54°, there are 42° clearly, how much is the 0.54 anyway?

well, we know there are 60 minutes in 1 degree, therefore 0.54 * 60 is how many minutes in 0.54, or 32.4'.  So a whole 32' and 0.4 of a minute.

how many seconds in 0.4 minutes?   well, there are 60 seconds in 1 minute, thus 0.4* 60, or 24.

L42.54  is then 42° 32' 24".
3 0
4 years ago
Gerhard's Bistro has an 5:8 ratio of lunch customers to dinner customers. It averages 40 lunch customers. What is its average nu
zlopas [31]
Solve this ratio:

 5      40
--- = -----
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Then 5x = 320, and x = 64.  So, on a day on which there are 40 lunch customers, there are 64 dinner customers (answer).
4 0
4 years ago
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Which equation could represent function R
IgorLugansk [536]
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8 0
3 years ago
Solve: 7m + 12 = −4m + 78
Mandarinka [93]

7m + 12 = -4m + 78

7m + 4m = 78 - 12

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7 0
3 years ago
Fill in the blanks to complete the sentences below. (a) As the number of samples​ increases, the proportion of​ 95% confidence i
schepotkina [342]

Answer:

a) the proportion of​ 95% confidence intervals that include the population proportion approaches 0.95

b) Sample proportion does not include the population proportion then the sample proportion is more than 1.96 standard error from the population proportion

Step-by-step explanation:

a)

Given the the data in the question, confidence level is 95%.

In this case as the number of samples increases, the proportion of 95% confidence intervals that include the population proportion approaches 0.95. hence the expected value of the proportion.

b)

Given the the data in the question, confidence level is 95% and sample proportion

we know that In normal distribution 68% confidence indicate one standard deviation, 95% confidence indicate 2 standard deviation while 99.97% confidence indicate 3 standard deviation.

The sample proportion does not include the population proportion, in 95% confidence from the standard normal table 0.95 value lies within the critical value of 1.96 approximately 2.

hence ( z =2 ) that satisfied the 1.96 standard error from the population proportion

hence, Sample proportion does not include the population proportion then the sample proportion is more than 1.96 standard error from the population proportion

7 0
3 years ago
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