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N76 [4]
3 years ago
8

You cut 63 feet of rope into 9 equal pieces how long is each equal piece of rope

Mathematics
2 answers:
nexus9112 [7]3 years ago
5 0
Just divide 63 by 9. 63÷9=7. Therefore, your answer is 7. Hoped I helped. :)
irina1246 [14]3 years ago
3 0
All the pieces of rope are 7 feet long. you take 63 and divide it by 9.
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The rate at which a duck gains weight is proportional to the difference between its adult weight and its current weight. At time
kogti [31]
DB/dt = 1/5(100 - B)
5/(100 - B) dB = dt
-5 ln (100 - B) = t + C
Since B(0) = 20, then
-5 ln (100 - 20) = C
i.e. C = -5 ln 80

Thus -5 ln (100 - B) = t - 5 ln 80
or t = 5 ln 80 - 5 ln (100 - B) = 5 ln (80 / (100 - B))

When the weight = 40 grams
t = 5 In (80 / 100 - 40) = 5 In (80 / 60) = 5 ln (4/3) = 1.438 days
Rate of weight gain = 40 / 1.438 = 27.8 grams per day

When the weight = 70 grams
t = 5 ln (80 / 100 - 70) = 5 ln (80 / 30) = 5 ln (8/3) = 4.9 days
Rate of weight gain = 70/4.9 = 14.27 grams per day.

Therefore, the duck gains weight faster when it weighs 40 grams.
6 0
3 years ago
25 POINTS!!!!!!!!! ALGEBRA 2 STATISTICS QUESTION!!!!!!!!!!!!!!
Serga [27]
A median is 65 inches and a standard deviation is 1.7:
a.   65 + 1 SD = 65 + 1.7 = 66.7 in
It means that there are : 100% - ( 50% + 34% ) = 100% - 84% = 16% students taller than 66.7 inches.
b.  Heights between 61.6 in and 68.7 in are within 2 standard deviations:
13.5% + 34% + 13.5% + 34% = 95%
0.95 * 300 = 285
There are 285 students between 61.6 in and 68.7 in tall. 
6 0
3 years ago
Factorise ab+cb+ad+cd ​
shutvik [7]

Answer:

ab=a×b

cb=c×b

ad=a×d

cd=c×d

4 0
2 years ago
Read 2 more answers
A researcher wants to study sports-watching behavior of young men. In a random sample of 18 young adult men 20-30 years old, eac
prohojiy [21]

Answer:

Null hypothesis: \mu \leq 50

Alternative hypothesis: \mu >50

A type of error I for this case would be reject the null hypothesis that the population proportion is lower or equal than 50 when actually is true.

So then the best option for this case is:

b. The researcher concludes that the mean amount of television watched by young men is greater than 50 (reject the null hypothesis), when the mean is really less than or equal to 50.

Step-by-step explanation:

Previous concepts

A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".  

The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".  

The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".  

Type I error, also known as a “false positive” is the error of rejecting a null  hypothesis when it is actually true. Can be interpreted as the error of no reject an  alternative hypothesis when the results can be  attributed not to the reality.  

Type II error, also known as a "false negative" is the error of not rejecting a null  hypothesis when the alternative hypothesis is the true. Can be interpreted as the error of failing to accept an alternative hypothesis when we don't have enough statistical power.  

Solution to the problem

On this case we want to test if the mean amount of television watched daily by young men is greater than 50 minutes), so the system of hypothesis would be:

Null hypothesis:  \mu \leq 50

Alternative hypothesis: \mu >50

A type of error I for this case would be reject the null hypothesis that the population proportion is lower or equal than 50 when actually is true.

So then the best option for this case is:

b. The researcher concludes that the mean amount of television watched by young men is greater than 50 (reject the null hypothesis), when the mean is really less than or equal to 50.

5 0
3 years ago
9c + 1 = 10 <br><br>whats the answer..? ​
stepladder [879]

Answer:

c = 1

Step-by-step explanation:

9 x 1 + 1 = 10

Hope this helps!

5 0
3 years ago
Read 2 more answers
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