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3 years ago

This is my question please help

Mathematics

2 answers:

umka21 [38]3 years ago

7 0

Answer:

Step-by-step explanation:

You divide 49 which is the area by each choice. When you do that you get 7 cm is what you use to get the perimeter by adding 7 cm 4 times because it is a square. So 7+7+7+7=28

Olin [163]3 years ago

3 0

28cm is correct answer

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777dan777 [17]

Answer:

Step-by-step explanation:

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3 years ago

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neonofarm [45]

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3 years ago

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Wayne's service center operates a welding shop. Assume that the arrival of jobs follows a Poisson distribution with 2 jobs arriv

Reika [66]

Answer:

a) 0.3125 per hour

b) 2.225 hours

c) 8.9 hours

d) 12.1 hours

e) 80%

Step-by-step explanation:

Given that:

mean time = 3.2 hours, standard deviation (σ) = 2 hours

The mean service rate in jobs per hour (λ) = 2 jobs/ 8 hour = 0.25 job/hour

a) The average number of jobs waiting for service (μ)= 1/ mean time = 1/ 3.2 = 0.3125 per hour

b) The average time a job waits before the welder can begin working on it (L) is given by:

$L=\frac{\lambda^2\sigma^2+(\lambda/\mu)^2}{2(1-\lambda/\mu))} =\frac{0.25^2*0.2^2+(0.25/0.3125)^2}{2(1-0.25/0.3125)}=2.225\ hours$

c) The average number of hours between when a job is received and when it is completed (Wq) is given as:

$W_q=\frac{L}{\lambda}=2.225/0.25=8.9\ hours$

d) The average number of hours between when a job is received and when it is completed (W) is given as:

$W=W_q+\frac{1}{\mu} =8.9+\frac{1}{0.3125}=12.1 \ hours$

e) Percentage of the time is Gubser's welder busy (P) is given as:

$P=\frac{\lambda}{\mu}=0.25/0.3125=0.8=80\%$

4 0

3 years ago

At a bakery, a baker prepares 6 dozen blueberry muffins for every 5 dozen apple muffins. If the baker prepares 16 dozen blueberr

spayn [35]

I would write a proportion, I can't use a fraction bar so they will just be on top of each other:
Blueberry Muffins 6
Apple Muffins 5
For every 6 Blueberry muffins there are 5 apple muffins (dozens)
So when he makes 16 blueberry muffins (dozens)
You write it next to the '6' because it's talking about blueberry muffin dozens.
The proportion now:

Blueberry Muffins 6 16
Apple Muffins 5 x
To find x, or the number of apple muffin dozens, you multiply 16 * 5, which is
80.
Then divide by 6.
80/6= 13.333
You can't have .333 of a dozen, so round it to 13.
***ANSWER***
He prepared 13 Apple muffin dozens.
Hope this helped <3

5 0

3 years ago