1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
balandron [24]
2 years ago
15

ratio of a rectangle's length to its width is 4:7. If the longer side is 31.5in., find the width, the perimeter, and the area of

this rectangle.
Mathematics
1 answer:
Nikitich [7]2 years ago
3 0

Answer:

Step-by-step explanation:

Ratio of length : width = 4 : 7

Length = 4x

Width = 7x

Longer side = 31.5 in

⇒ 7x = 31.5

Divide both sides by 7

x = 31.5/7

x = 4.5

length = 4x

           = 4*4.5

         l = 18 in

width =  31.5

       w = 31.5 in

\boxed{ \text {Perimeter of  rectangle }= 2*l + 2*w}

                                      = 2*18 + 2*31.5

                                      = 36 +  63

                                      = 99 in

\boxed{ \text{Area of rectangle = l*w}}

                             = 18*31.5

                             =  567 in²

                             

You might be interested in
3. A team of eye surgeons has developed a new technique for a risky eye operation to restore the
Zigmanuir [339]

Answer:

Yes the new method if sample size was less than 20 than that of old method or identical sample numbers of old and new the differences still prove the new operation is better. As 88 patients minus 1% still shows us 76.7475 significance of  old method being low point 67.5 = 30% of 225 and proved a 65.25 low point and 69.75 high point which is also a 20% jump to new methods low point significance.

You cna show this as workings to prove or follow any of the below statements.

Where new method of 88 patients -0.01 significance rate stands at 76.7475. This figure has reduced by 11.2525 from 88 patients to 76.7 we compare this to the old method if reversing significance we find  = 62.5 and it's 30% standing value of 67.5  as +1% increase shows us 31% = 69.7  ( 0.31 x 225 = 69.74)

Step-by-step explanation:

88/225  = 0.39111111111 = 39.11%%

P value 01 = 1%  =  225.225 or 5% range of alternative hypotheses.

To graph the P value we take the distance between the sample mean and the null hypothesis value (225 + 1% of sample - x nhv) = y ). We can graph the probability of obtaining a sample mean  (225 +/- ( x +1% of sample) where nhv has a decimal if needed to utilize the 1% added). we would replace nvp in this example with  Ha or H1 which means the alternative hypotheses as the data shows less than or equal to.

We can then show 225.225 -  Ha or H1  then graph the probability of obtaining a sample mean that is at least extreme in both tails  Ha or H1

However it would be the other way round where you take the first set of data and use the sample as the 30% significance of that sample indicates it may be a larger sample or a higher significance. Therefore this would be used in the graphing - 1%

We prove that 30-1 =29  where 29% of 225 = 225 x 0.29 = 65.25

this way we have proved that the new set of data being equal to 88 patients regaining their eyesight is <23 and can be written like this 65.25< x <88

This means that sample mean has taken the 1% to show on the graph we can show 225> 33.11 +1 .

We can prove that both indifference of significance would reduce when 1% is added and close based on being a higher percentage to begin with.

34.11 = 0.3411 x 225 = 76.7475 for second surgeon = 33.11% +1

Where as shown

30 = 0.3 x 225 = 67.5

76.5475 - 67.5 = 9.04 difference when comparing old method = +1%

where new method stands at 76.7475 has reduced by 11.2525 from 88 patients and where old method if reversing = 62.5 and has reduced from 67.5  as +1% and 31% = 69.7  ( 0.31 x 225 = 69.74)

You would therefore graph each higher methods first if comparing both by 0.01 or show 88 on graph and 76.7475 = +1%

NB/ if sample size was 20 more in the old data then 225+20 = 245 x 0.29 = 71.05 and would still be lower than new data. = 2.0 increase level of significance and not relevant unless you are looking for the decrease which means new is greater than 20% success than that of old method findings where 30% = 67.5.

5 0
3 years ago
sara wants to buy a necklace. the necklace has a list pice of $41 and the saels tax is 6%what will be the cost of the necklace a
gladu [14]
41multiply by 0.06+24.6
41+24.6=43.46
7 0
3 years ago
Read 2 more answers
A, B, and C are collinear. True or False?
Dafna1 [17]

Answer:

It is false. Just look at the face of the shape.

Step-by-step explanation:

4 0
3 years ago
A semi circle is drawn on each side of the square as shown the square has sides length of 2 pi what is the area of the resulting
Marina86 [1]

Step-by-step explanation:

First you find out the area of the square.

Then you find the area of the circle.

After this you add the Two area together.

7 0
3 years ago
Find the circumference of a circle with a radius of 11.15 cm
Georgia [21]

Answer:

390.377

Step-by-step explanation:

pi*r^2

6 0
2 years ago
Other questions:
  • t takes Audrey 35 hour to paint 25 square yards of wood to be used for making shelves. How many square yards can she paint in 1
    6·2 answers
  • Help. Only #21 thanks
    13·1 answer
  • Can someone help me?
    13·1 answer
  • Calculate 1/3 of 50 cm<br><br> Plssss helpppp solve....
    14·2 answers
  • If a wholesale price of an item is $250 and the markup is 25%. how much will you pay for the item.
    9·1 answer
  • What is the measure of eg?
    13·1 answer
  • Which situation has a probability of 1/2?
    12·2 answers
  • I will give brainlest
    11·2 answers
  • PLSSS HELLLPPP MEE!!
    5·1 answer
  • I will give a brainliest and 20pts to the person that can use the Pythagorean theorem to solve for x. Please help. I went over i
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!