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bearhunter [10]
3 years ago
13

Katie cut out a rectangular piece of wrapping paper that was 2 times as long and 3 times as wide as the box that she was wrappin

g. the box was 5inches long and 4 inches wide. what is the perimeter of the wrapping paper that katie cut?
Mathematics
1 answer:
kotegsom [21]3 years ago
3 0
2*5=10 (the measure of one long side is 10)
3*4=12 (the measure of one wide side is 12)


A box has four sides to the perimeter of the flat wrapping paper must consist of four edges.  Because we know that one edge is 10 inches long and another side is 12 inches wide we assume that the corresponding sides are equal.  


So now we know that we have two sides that are 10 inches and 2 sides that are 12 inches.


10+10+12+12= 44 inches
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I need help on B and C. Not sure how I can solve those. Can someone please help me out here? Thank you for your help!
Valentin [98]

Nice job with part A on getting those correct answers.

====================================================

Part B

  • mu = mean = 43
  • sigma = standard deviation = 3

Let's calculate the z score for the raw score x = 37

z = (x - mu)/sigma

z = (37 - 43)/3

z = -6/3

z = -2

A negative z score tells us we're below the mean. Specifically, we are exactly 2 standard deviations under the mean.

If you repeat those steps for x = 46 (not changing mu or sigma), then you should get z = 1. So we're now 1 standard deviation above the mean.

Ultimately, we want to know the area under the standard normal curve (aka z curve) from z = -2 to z = 1.

Refer to the chart below which is a breakdown of the Empirical Rule. The pink areas are within 1 standard deviation of the mean. We have two regions taking up roughly 34% of the full area under the curve, so they combine to 34+34 = 68%

Then we add on another 13.5% which is the blue area on the left (between z = -2 and z = -1)

So 13.5+68 = 81.5% of the area under the curve is between z = -2 and z = 1.

<h3>Answer: 81.5</h3>

Note: the percent sign is already taken care of for us, so there's no need to type it in. But the answer above of course means 81.5% and that answer is approximate.

====================================================

Part C

Let's find the z score for x = 34. The values of mu and sigma are the same as before.

z = (x - mu)/sigma

z = (34-43)/3

z = -9/3

z = -3

So computing P(X > 34) is the same as P(Z > -3)

Notice how adding up all of the values in the chart mentioned gets us:

2.35+13.5+34+34+13.5+2.35 = 99.7

which means 99.7% of the distribution is within 3 standard deviations of the mean. The remaining 100% - 99.7% = 0.3% is the combined area of both tails. So each tail is (0.3%)/2 = 0.15%

In short, 0.15% of the area under the curve is to the left of z = -3

Therefore, 100% - 0.15% = 99.85% of the widgets are going to have z values larger than -3, which in turn means they have values larger than 34.

<h3>Answer: 99.85</h3>

Again you don't have to worry about the percent sign. Like before, the answer is approximate.

5 0
3 years ago
When two distinct circles lie in the same plane, what is the largest number of points at which they can intersect?
Rama09 [41]
All the points if they lay on top of eachother

if they arent on top of eachother, they can intersect at 2 points
6 0
3 years ago
Plz help!!
user100 [1]

I WILL GIVE YOU BRAINLIEST AND 20 POINTS PLEASE HELP!

Do these two cards represent the same relationship?  Explain how you know.

6 0
3 years ago
R=P over I squared. Solve for I.
kirza4 [7]

Answer: I=sqrt(P/R)

Step-by-step explanation:

R=p/I^2

Multiple l squared on both sides...

(I^2) R=p/l^2 (l^2)

R(I^2)=p

Separate I by dividing both sides by R...

I^2=p/R

Square root both sides...

I=sqrt(P/R)

6 0
3 years ago
Read 2 more answers
This is to my other question I put
Cerrena [4.2K]

Answer:

460

Step-by-step explanation:

5 0
3 years ago
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